# 数据库专项练习

[English Version](/solution/DATABASE_README_EN.md)

## 题解

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| 题号 | 题解                                                                                                                                                         | 标签     | 难度 | 备注 |
| ---- | ------------------------------------------------------------------------------------------------------------------------------------------------------------ | -------- | ---- | ---- |
| 0175 | [组合两个表](/solution/0100-0199/0175.Combine%20Two%20Tables/README.md)                                                                                      | `数据库` | 简单 |      |
| 0176 | [第二高的薪水](/solution/0100-0199/0176.Second%20Highest%20Salary/README.md)                                                                                 | `数据库` | 中等 |      |
| 0177 | [第N高的薪水](/solution/0100-0199/0177.Nth%20Highest%20Salary/README.md)                                                                                     | `数据库` | 中等 |      |
| 0178 | [分数排名](/solution/0100-0199/0178.Rank%20Scores/README.md)                                                                                                 | `数据库` | 中等 |      |
| 0180 | [连续出现的数字](/solution/0100-0199/0180.Consecutive%20Numbers/README.md)                                                                                   | `数据库` | 中等 |      |
| 0181 | [超过经理收入的员工](/solution/0100-0199/0181.Employees%20Earning%20More%20Than%20Their%20Managers/README.md)                                                | `数据库` | 简单 |      |
| 0182 | [查找重复的电子邮箱](/solution/0100-0199/0182.Duplicate%20Emails/README.md)                                                                                  | `数据库` | 简单 |      |
| 0183 | [从不订购的客户](/solution/0100-0199/0183.Customers%20Who%20Never%20Order/README.md)                                                                         | `数据库` | 简单 |      |
| 0184 | [部门工资最高的员工](/solution/0100-0199/0184.Department%20Highest%20Salary/README.md)                                                                       | `数据库` | 中等 |      |
| 0185 | [部门工资前三高的所有员工](/solution/0100-0199/0185.Department%20Top%20Three%20Salaries/README.md)                                                           | `数据库` | 困难 |      |
| 0196 | [删除重复的电子邮箱](/solution/0100-0199/0196.Delete%20Duplicate%20Emails/README.md)                                                                         | `数据库` | 简单 |      |
| 0197 | [上升的温度](/solution/0100-0199/0197.Rising%20Temperature/README.md)                                                                                        | `数据库` | 简单 |      |
| 0262 | [行程和用户](/solution/0200-0299/0262.Trips%20and%20Users/README.md)                                                                                         | `数据库` | 困难 |      |
| 0511 | [游戏玩法分析 I](/solution/0500-0599/0511.Game%20Play%20Analysis%20I/README.md)                                                                              | `数据库` | 简单 |      |
| 0512 | [游戏玩法分析 II](/solution/0500-0599/0512.Game%20Play%20Analysis%20II/README.md)                                                                            | `数据库` | 简单 | 🔒   |
| 0534 | [游戏玩法分析 III](/solution/0500-0599/0534.Game%20Play%20Analysis%20III/README.md)                                                                          | `数据库` | 中等 | 🔒   |
| 0550 | [游戏玩法分析 IV](/solution/0500-0599/0550.Game%20Play%20Analysis%20IV/README.md)                                                                            | `数据库` | 中等 |      |
| 0569 | [员工薪水中位数](/solution/0500-0599/0569.Median%20Employee%20Salary/README.md)                                                                              | `数据库` | 困难 | 🔒   |
| 0570 | [至少有5名直接下属的经理](/solution/0500-0599/0570.Managers%20with%20at%20Least%205%20Direct%20Reports/README.md)                                            | `数据库` | 中等 |      |
| 0571 | [给定数字的频率查询中位数](/solution/0500-0599/0571.Find%20Median%20Given%20Frequency%20of%20Numbers/README.md)                                              | `数据库` | 困难 | 🔒   |
| 0574 | [当选者](/solution/0500-0599/0574.Winning%20Candidate/README.md)                                                                                             | `数据库` | 中等 | 🔒   |
| 0577 | [员工奖金](/solution/0500-0599/0577.Employee%20Bonus/README.md)                                                                                              | `数据库` | 简单 |      |
| 0578 | [查询回答率最高的问题](/solution/0500-0599/0578.Get%20Highest%20Answer%20Rate%20Question/README.md)                                                          | `数据库` | 中等 | 🔒   |
| 0579 | [查询员工的累计薪水](/solution/0500-0599/0579.Find%20Cumulative%20Salary%20of%20an%20Employee/README.md)                                                     | `数据库` | 困难 | 🔒   |
| 0580 | [统计各专业学生人数](/solution/0500-0599/0580.Count%20Student%20Number%20in%20Departments/README.md)                                                         | `数据库` | 中等 | 🔒   |
| 0584 | [寻找用户推荐人](/solution/0500-0599/0584.Find%20Customer%20Referee/README.md)                                                                               | `数据库` | 简单 |      |
| 0585 | [2016年的投资](/solution/0500-0599/0585.Investments%20in%202016/README.md)                                                                                   | `数据库` | 中等 |      |
| 0586 | [订单最多的客户](/solution/0500-0599/0586.Customer%20Placing%20the%20Largest%20Number%20of%20Orders/README.md)                                               | `数据库` | 简单 |      |
| 0595 | [大的国家](/solution/0500-0599/0595.Big%20Countries/README.md)                                                                                               | `数据库` | 简单 |      |
| 0596 | [超过 5 名学生的课](/solution/0500-0599/0596.Classes%20More%20Than%205%20Students/README.md)                                                                 | `数据库` | 简单 |      |
| 0597 | [好友申请 I：总体通过率](/solution/0500-0599/0597.Friend%20Requests%20I%20Overall%20Acceptance%20Rate/README.md)                                             | `数据库` | 简单 | 🔒   |
| 0601 | [体育馆的人流量](/solution/0600-0699/0601.Human%20Traffic%20of%20Stadium/README.md)                                                                          | `数据库` | 困难 |      |
| 0602 | [好友申请 II ：谁有最多的好友](/solution/0600-0699/0602.Friend%20Requests%20II%20Who%20Has%20the%20Most%20Friends/README.md)                                 | `数据库` | 中等 |      |
| 0603 | [连续空余座位](/solution/0600-0699/0603.Consecutive%20Available%20Seats/README.md)                                                                           | `数据库` | 简单 | 🔒   |
| 0607 | [销售员](/solution/0600-0699/0607.Sales%20Person/README.md)                                                                                                  | `数据库` | 简单 |      |
| 0608 | [树节点](/solution/0600-0699/0608.Tree%20Node/README.md)                                                                                                     | `数据库` | 中等 |      |
| 0610 | [判断三角形](/solution/0600-0699/0610.Triangle%20Judgement/README.md)                                                                                        | `数据库` | 简单 |      |
| 0612 | [平面上的最近距离](/solution/0600-0699/0612.Shortest%20Distance%20in%20a%20Plane/README.md)                                                                  | `数据库` | 中等 | 🔒   |
| 0613 | [直线上的最近距离](/solution/0600-0699/0613.Shortest%20Distance%20in%20a%20Line/README.md)                                                                   | `数据库` | 简单 | 🔒   |
| 0614 | [二级关注者](/solution/0600-0699/0614.Second%20Degree%20Follower/README.md)                                                                                  | `数据库` | 中等 | 🔒   |
| 0615 | [平均工资：部门与公司比较](/solution/0600-0699/0615.Average%20Salary%20Departments%20VS%20Company/README.md)                                                 | `数据库` | 困难 | 🔒   |
| 0618 | [学生地理信息报告](/solution/0600-0699/0618.Students%20Report%20By%20Geography/README.md)                                                                    | `数据库` | 困难 | 🔒   |
| 0619 | [只出现一次的最大数字](/solution/0600-0699/0619.Biggest%20Single%20Number/README.md)                                                                         | `数据库` | 简单 |      |
| 0620 | [有趣的电影](/solution/0600-0699/0620.Not%20Boring%20Movies/README.md)                                                                                       | `数据库` | 简单 |      |
| 0626 | [换座位](/solution/0600-0699/0626.Exchange%20Seats/README.md)                                                                                                | `数据库` | 中等 |      |
| 0627 | [变更性别](/solution/0600-0699/0627.Swap%20Salary/README.md)                                                                                                 | `数据库` | 简单 |      |
| 1045 | [买下所有产品的客户](/solution/1000-1099/1045.Customers%20Who%20Bought%20All%20Products/README.md)                                                           | `数据库` | 中等 |      |
| 1050 | [合作过至少三次的演员和导演](/solution/1000-1099/1050.Actors%20and%20Directors%20Who%20Cooperated%20At%20Least%20Three%20Times/README.md)                    | `数据库` | 简单 |      |
| 1068 | [产品销售分析 I](/solution/1000-1099/1068.Product%20Sales%20Analysis%20I/README.md)                                                                          | `数据库` | 简单 |      |
| 1069 | [产品销售分析 II](/solution/1000-1099/1069.Product%20Sales%20Analysis%20II/README.md)                                                                        | `数据库` | 简单 | 🔒   |
| 1070 | [产品销售分析 III](/solution/1000-1099/1070.Product%20Sales%20Analysis%20III/README.md)                                                                      | `数据库` | 中等 |      |
| 1075 | [项目员工 I](/solution/1000-1099/1075.Project%20Employees%20I/README.md)                                                                                     | `数据库` | 简单 |      |
| 1076 | [项目员工II](/solution/1000-1099/1076.Project%20Employees%20II/README.md)                                                                                    | `数据库` | 简单 | 🔒   |
| 1077 | [项目员工 III](/solution/1000-1099/1077.Project%20Employees%20III/README.md)                                                                                 | `数据库` | 中等 | 🔒   |
| 1082 | [销售分析 I ](/solution/1000-1099/1082.Sales%20Analysis%20I/README.md)                                                                                       | `数据库` | 简单 | 🔒   |
| 1083 | [销售分析 II](/solution/1000-1099/1083.Sales%20Analysis%20II/README.md)                                                                                      | `数据库` | 简单 | 🔒   |
| 1084 | [销售分析III](/solution/1000-1099/1084.Sales%20Analysis%20III/README.md)                                                                                     | `数据库` | 简单 |      |
| 1097 | [游戏玩法分析 V](/solution/1000-1099/1097.Game%20Play%20Analysis%20V/README.md)                                                                              | `数据库` | 困难 | 🔒   |
| 1098 | [小众书籍](/solution/1000-1099/1098.Unpopular%20Books/README.md)                                                                                             | `数据库` | 中等 | 🔒   |
| 1107 | [每日新用户统计](/solution/1100-1199/1107.New%20Users%20Daily%20Count/README.md)                                                                             | `数据库` | 中等 | 🔒   |
| 1112 | [每位学生的最高成绩](/solution/1100-1199/1112.Highest%20Grade%20For%20Each%20Student/README.md)                                                              | `数据库` | 中等 | 🔒   |
| 1113 | [报告的记录](/solution/1100-1199/1113.Reported%20Posts/README.md)                                                                                            | `数据库` | 简单 | 🔒   |
| 1126 | [查询活跃业务](/solution/1100-1199/1126.Active%20Businesses/README.md)                                                                                       | `数据库` | 中等 | 🔒   |
| 1127 | [用户购买平台](/solution/1100-1199/1127.User%20Purchase%20Platform/README.md)                                                                                | `数据库` | 困难 | 🔒   |
| 1132 | [报告的记录 II](/solution/1100-1199/1132.Reported%20Posts%20II/README.md)                                                                                    | `数据库` | 中等 | 🔒   |
| 1141 | [查询近30天活跃用户数](/solution/1100-1199/1141.User%20Activity%20for%20the%20Past%2030%20Days%20I/README.md)                                                | `数据库` | 简单 |      |
| 1142 | [过去30天的用户活动 II](/solution/1100-1199/1142.User%20Activity%20for%20the%20Past%2030%20Days%20II/README.md)                                              | `数据库` | 简单 | 🔒   |
| 1148 | [文章浏览 I](/solution/1100-1199/1148.Article%20Views%20I/README.md)                                                                                         | `数据库` | 简单 |      |
| 1149 | [文章浏览 II](/solution/1100-1199/1149.Article%20Views%20II/README.md)                                                                                       | `数据库` | 中等 | 🔒   |
| 1158 | [市场分析 I](/solution/1100-1199/1158.Market%20Analysis%20I/README.md)                                                                                       | `数据库` | 中等 |      |
| 1159 | [市场分析 II](/solution/1100-1199/1159.Market%20Analysis%20II/README.md)                                                                                     | `数据库` | 困难 | 🔒   |
| 1164 | [指定日期的产品价格](/solution/1100-1199/1164.Product%20Price%20at%20a%20Given%20Date/README.md)                                                             | `数据库` | 中等 |      |
| 1173 | [即时食物配送 I](/solution/1100-1199/1173.Immediate%20Food%20Delivery%20I/README.md)                                                                         | `数据库` | 简单 | 🔒   |
| 1174 | [即时食物配送 II](/solution/1100-1199/1174.Immediate%20Food%20Delivery%20II/README.md)                                                                       | `数据库` | 中等 |      |
| 1179 | [重新格式化部门表](/solution/1100-1199/1179.Reformat%20Department%20Table/README.md)                                                                         | `数据库` | 简单 |      |
| 1193 | [每月交易 I](/solution/1100-1199/1193.Monthly%20Transactions%20I/README.md)                                                                                  | `数据库` | 中等 |      |
| 1194 | [锦标赛优胜者](/solution/1100-1199/1194.Tournament%20Winners/README.md)                                                                                      | `数据库` | 困难 | 🔒   |
| 1204 | [最后一个能进入巴士的人](/solution/1200-1299/1204.Last%20Person%20to%20Fit%20in%20the%20Bus/README.md)                                                       | `数据库` | 中等 |      |
| 1205 | [每月交易 II](/solution/1200-1299/1205.Monthly%20Transactions%20II/README.md)                                                                                | `数据库` | 中等 | 🔒   |
| 1211 | [查询结果的质量和占比](/solution/1200-1299/1211.Queries%20Quality%20and%20Percentage/README.md)                                                              | `数据库` | 简单 |      |
| 1212 | [查询球队积分](/solution/1200-1299/1212.Team%20Scores%20in%20Football%20Tournament/README.md)                                                                | `数据库` | 中等 | 🔒   |
| 1225 | [报告系统状态的连续日期](/solution/1200-1299/1225.Report%20Contiguous%20Dates/README.md)                                                                     | `数据库` | 困难 | 🔒   |
| 1241 | [每个帖子的评论数](/solution/1200-1299/1241.Number%20of%20Comments%20per%20Post/README.md)                                                                   | `数据库` | 简单 | 🔒   |
| 1251 | [平均售价](/solution/1200-1299/1251.Average%20Selling%20Price/README.md)                                                                                     | `数据库` | 简单 |      |
| 1264 | [页面推荐](/solution/1200-1299/1264.Page%20Recommendations/README.md)                                                                                        | `数据库` | 中等 | 🔒   |
| 1270 | [向公司 CEO 汇报工作的所有人](/solution/1200-1299/1270.All%20People%20Report%20to%20the%20Given%20Manager/README.md)                                         | `数据库` | 中等 | 🔒   |
| 1280 | [学生们参加各科测试的次数](/solution/1200-1299/1280.Students%20and%20Examinations/README.md)                                                                 | `数据库` | 简单 |      |
| 1285 | [找到连续区间的开始和结束数字](/solution/1200-1299/1285.Find%20the%20Start%20and%20End%20Number%20of%20Continuous%20Ranges/README.md)                        | `数据库` | 中等 | 🔒   |
| 1294 | [不同国家的天气类型](/solution/1200-1299/1294.Weather%20Type%20in%20Each%20Country/README.md)                                                                | `数据库` | 简单 | 🔒   |
| 1303 | [求团队人数](/solution/1300-1399/1303.Find%20the%20Team%20Size/README.md)                                                                                    | `数据库` | 简单 | 🔒   |
| 1308 | [不同性别每日分数总计](/solution/1300-1399/1308.Running%20Total%20for%20Different%20Genders/README.md)                                                       | `数据库` | 中等 | 🔒   |
| 1321 | [餐馆营业额变化增长](/solution/1300-1399/1321.Restaurant%20Growth/README.md)                                                                                 | `数据库` | 中等 |      |
| 1322 | [广告效果](/solution/1300-1399/1322.Ads%20Performance/README.md)                                                                                             | `数据库` | 简单 | 🔒   |
| 1327 | [列出指定时间段内所有的下单产品](/solution/1300-1399/1327.List%20the%20Products%20Ordered%20in%20a%20Period/README.md)                                       | `数据库` | 简单 |      |
| 1336 | [每次访问的交易次数](/solution/1300-1399/1336.Number%20of%20Transactions%20per%20Visit/README.md)                                                            | `数据库` | 困难 | 🔒   |
| 1341 | [电影评分](/solution/1300-1399/1341.Movie%20Rating/README.md)                                                                                                | `数据库` | 中等 |      |
| 1350 | [院系无效的学生](/solution/1300-1399/1350.Students%20With%20Invalid%20Departments/README.md)                                                                 | `数据库` | 简单 | 🔒   |
| 1355 | [活动参与者](/solution/1300-1399/1355.Activity%20Participants/README.md)                                                                                     | `数据库` | 中等 | 🔒   |
| 1364 | [顾客的可信联系人数量](/solution/1300-1399/1364.Number%20of%20Trusted%20Contacts%20of%20a%20Customer/README.md)                                              | `数据库` | 中等 | 🔒   |
| 1369 | [获取最近第二次的活动](/solution/1300-1399/1369.Get%20the%20Second%20Most%20Recent%20Activity/README.md)                                                     | `数据库` | 困难 | 🔒   |
| 1378 | [使用唯一标识码替换员工ID](/solution/1300-1399/1378.Replace%20Employee%20ID%20With%20The%20Unique%20Identifier/README.md)                                    | `数据库` | 简单 |      |
| 1384 | [按年度列出销售总额](/solution/1300-1399/1384.Total%20Sales%20Amount%20by%20Year/README.md)                                                                  | `数据库` | 困难 | 🔒   |
| 1393 | [股票的资本损益](/solution/1300-1399/1393.Capital%20GainLoss/README.md)                                                                                      | `数据库` | 中等 |      |
| 1398 | [购买了产品 A 和产品 B 却没有购买产品 C 的顾客](/solution/1300-1399/1398.Customers%20Who%20Bought%20Products%20A%20and%20B%20but%20Not%20C/README.md)        | `数据库` | 中等 | 🔒   |
| 1407 | [排名靠前的旅行者](/solution/1400-1499/1407.Top%20Travellers/README.md)                                                                                      | `数据库` | 简单 |      |
| 1412 | [查找成绩处于中游的学生](/solution/1400-1499/1412.Find%20the%20Quiet%20Students%20in%20All%20Exams/README.md)                                                | `数据库` | 困难 | 🔒   |
| 1421 | [净现值查询](/solution/1400-1499/1421.NPV%20Queries/README.md)                                                                                               | `数据库` | 简单 | 🔒   |
| 1435 | [制作会话柱状图](/solution/1400-1499/1435.Create%20a%20Session%20Bar%20Chart/README.md)                                                                      | `数据库` | 简单 | 🔒   |
| 1440 | [计算布尔表达式的值](/solution/1400-1499/1440.Evaluate%20Boolean%20Expression/README.md)                                                                     | `数据库` | 中等 | 🔒   |
| 1445 | [苹果和桔子](/solution/1400-1499/1445.Apples%20%26%20Oranges/README.md)                                                                                      | `数据库` | 中等 | 🔒   |
| 1454 | [活跃用户](/solution/1400-1499/1454.Active%20Users/README.md)                                                                                                | `数据库` | 中等 | 🔒   |
| 1459 | [矩形面积](/solution/1400-1499/1459.Rectangles%20Area/README.md)                                                                                             | `数据库` | 中等 | 🔒   |
| 1468 | [计算税后工资](/solution/1400-1499/1468.Calculate%20Salaries/README.md)                                                                                      | `数据库` | 中等 | 🔒   |
| 1479 | [周内每天的销售情况](/solution/1400-1499/1479.Sales%20by%20Day%20of%20the%20Week/README.md)                                                                  | `数据库` | 困难 | 🔒   |
| 1484 | [按日期分组销售产品](/solution/1400-1499/1484.Group%20Sold%20Products%20By%20The%20Date/README.md)                                                           | `数据库` | 简单 |      |
| 1495 | [上月播放的儿童适宜电影](/solution/1400-1499/1495.Friendly%20Movies%20Streamed%20Last%20Month/README.md)                                                     | `数据库` | 简单 | 🔒   |
| 1501 | [可以放心投资的国家](/solution/1500-1599/1501.Countries%20You%20Can%20Safely%20Invest%20In/README.md)                                                        | `数据库` | 中等 | 🔒   |
| 1511 | [消费者下单频率](/solution/1500-1599/1511.Customer%20Order%20Frequency/README.md)                                                                            | `数据库` | 简单 | 🔒   |
| 1517 | [查找拥有有效邮箱的用户](/solution/1500-1599/1517.Find%20Users%20With%20Valid%20E-Mails/README.md)                                                           | `数据库` | 简单 |      |
| 1527 | [患某种疾病的患者](/solution/1500-1599/1527.Patients%20With%20a%20Condition/README.md)                                                                       | `数据库` | 简单 |      |
| 1532 | [最近的三笔订单](/solution/1500-1599/1532.The%20Most%20Recent%20Three%20Orders/README.md)                                                                    | `数据库` | 中等 | 🔒   |
| 1543 | [产品名称格式修复](/solution/1500-1599/1543.Fix%20Product%20Name%20Format/README.md)                                                                         | `数据库` | 简单 | 🔒   |
| 1549 | [每件商品的最新订单](/solution/1500-1599/1549.The%20Most%20Recent%20Orders%20for%20Each%20Product/README.md)                                                 | `数据库` | 中等 | 🔒   |
| 1555 | [银行账户概要](/solution/1500-1599/1555.Bank%20Account%20Summary/README.md)                                                                                  | `数据库` | 中等 | 🔒   |
| 1565 | [按月统计订单数与顾客数](/solution/1500-1599/1565.Unique%20Orders%20and%20Customers%20Per%20Month/README.md)                                                 | `数据库` | 简单 | 🔒   |
| 1571 | [仓库经理](/solution/1500-1599/1571.Warehouse%20Manager/README.md)                                                                                           | `数据库` | 简单 | 🔒   |
| 1581 | [进店却未进行过交易的顾客](/solution/1500-1599/1581.Customer%20Who%20Visited%20but%20Did%20Not%20Make%20Any%20Transactions/README.md)                        | `数据库` | 简单 |      |
| 1587 | [银行账户概要 II](/solution/1500-1599/1587.Bank%20Account%20Summary%20II/README.md)                                                                          | `数据库` | 简单 |      |
| 1596 | [每位顾客最经常订购的商品](/solution/1500-1599/1596.The%20Most%20Frequently%20Ordered%20Products%20for%20Each%20Customer/README.md)                          | `数据库` | 中等 | 🔒   |
| 1607 | [没有卖出的卖家](/solution/1600-1699/1607.Sellers%20With%20No%20Sales/README.md)                                                                             | `数据库` | 简单 | 🔒   |
| 1613 | [找到遗失的ID](/solution/1600-1699/1613.Find%20the%20Missing%20IDs/README.md)                                                                                | `数据库` | 中等 | 🔒   |
| 1623 | [三人国家代表队](/solution/1600-1699/1623.All%20Valid%20Triplets%20That%20Can%20Represent%20a%20Country/README.md)                                           | `数据库` | 简单 | 🔒   |
| 1633 | [各赛事的用户注册率](/solution/1600-1699/1633.Percentage%20of%20Users%20Attended%20a%20Contest/README.md)                                                    | `数据库` | 简单 |      |
| 1635 | [Hopper 公司查询 I](/solution/1600-1699/1635.Hopper%20Company%20Queries%20I/README.md)                                                                       | `数据库` | 困难 | 🔒   |
| 1645 | [Hopper 公司查询 II](/solution/1600-1699/1645.Hopper%20Company%20Queries%20II/README.md)                                                                     | `数据库` | 困难 | 🔒   |
| 1651 | [Hopper 公司查询 III](/solution/1600-1699/1651.Hopper%20Company%20Queries%20III/README.md)                                                                   | `数据库` | 困难 | 🔒   |
| 1661 | [每台机器的进程平均运行时间](/solution/1600-1699/1661.Average%20Time%20of%20Process%20per%20Machine/README.md)                                               | `数据库` | 简单 |      |
| 1667 | [修复表中的名字](/solution/1600-1699/1667.Fix%20Names%20in%20a%20Table/README.md)                                                                            | `数据库` | 简单 |      |
| 1677 | [发票中的产品金额](/solution/1600-1699/1677.Product%27s%20Worth%20Over%20Invoices/README.md)                                                                 | `数据库` | 简单 | 🔒   |
| 1683 | [无效的推文](/solution/1600-1699/1683.Invalid%20Tweets/README.md)                                                                                            | `数据库` | 简单 |      |
| 1693 | [每天的领导和合伙人](/solution/1600-1699/1693.Daily%20Leads%20and%20Partners/README.md)                                                                      | `数据库` | 简单 |      |
| 1699 | [两人之间的通话次数](/solution/1600-1699/1699.Number%20of%20Calls%20Between%20Two%20Persons/README.md)                                                       | `数据库` | 中等 | 🔒   |
| 1709 | [访问日期之间最大的空档期](/solution/1700-1799/1709.Biggest%20Window%20Between%20Visits/README.md)                                                           | `数据库` | 中等 | 🔒   |
| 1715 | [苹果和橘子的个数](/solution/1700-1799/1715.Count%20Apples%20and%20Oranges/README.md)                                                                        | `数据库` | 中等 | 🔒   |
| 1729 | [求关注者的数量](/solution/1700-1799/1729.Find%20Followers%20Count/README.md)                                                                                | `数据库` | 简单 |      |
| 1731 | [每位经理的下属员工数量](/solution/1700-1799/1731.The%20Number%20of%20Employees%20Which%20Report%20to%20Each%20Employee/README.md)                           | `数据库` | 简单 |      |
| 1741 | [查找每个员工花费的总时间](/solution/1700-1799/1741.Find%20Total%20Time%20Spent%20by%20Each%20Employee/README.md)                                            | `数据库` | 简单 |      |
| 1747 | [应该被禁止的 Leetflex 账户](/solution/1700-1799/1747.Leetflex%20Banned%20Accounts/README.md)                                                                | `数据库` | 中等 | 🔒   |
| 1757 | [可回收且低脂的产品](/solution/1700-1799/1757.Recyclable%20and%20Low%20Fat%20Products/README.md)                                                             | `数据库` | 简单 |      |
| 1767 | [寻找没有被执行的任务对](/solution/1700-1799/1767.Find%20the%20Subtasks%20That%20Did%20Not%20Execute/README.md)                                              | `数据库` | 困难 | 🔒   |
| 1777 | [每家商店的产品价格](/solution/1700-1799/1777.Product%27s%20Price%20for%20Each%20Store/README.md)                                                            | `数据库` | 简单 | 🔒   |
| 1783 | [大满贯数量](/solution/1700-1799/1783.Grand%20Slam%20Titles/README.md)                                                                                       | `数据库` | 中等 | 🔒   |
| 1789 | [员工的直属部门](/solution/1700-1799/1789.Primary%20Department%20for%20Each%20Employee/README.md)                                                            | `数据库` | 简单 |      |
| 1795 | [每个产品在不同商店的价格](/solution/1700-1799/1795.Rearrange%20Products%20Table/README.md)                                                                  | `数据库` | 简单 |      |
| 1809 | [没有广告的剧集](/solution/1800-1899/1809.Ad-Free%20Sessions/README.md)                                                                                      | `数据库` | 简单 | 🔒   |
| 1811 | [寻找面试候选人](/solution/1800-1899/1811.Find%20Interview%20Candidates/README.md)                                                                           | `数据库` | 中等 | 🔒   |
| 1821 | [寻找今年具有正收入的客户](/solution/1800-1899/1821.Find%20Customers%20With%20Positive%20Revenue%20this%20Year/README.md)                                    | `数据库` | 简单 | 🔒   |
| 1831 | [每天的最大交易](/solution/1800-1899/1831.Maximum%20Transaction%20Each%20Day/README.md)                                                                      | `数据库` | 中等 | 🔒   |
| 1841 | [联赛信息统计](/solution/1800-1899/1841.League%20Statistics/README.md)                                                                                       | `数据库` | 中等 | 🔒   |
| 1843 | [可疑银行账户](/solution/1800-1899/1843.Suspicious%20Bank%20Accounts/README.md)                                                                              | `数据库` | 中等 | 🔒   |
| 1853 | [转换日期格式](/solution/1800-1899/1853.Convert%20Date%20Format/README.md)                                                                                   | `数据库` | 简单 | 🔒   |
| 1867 | [最大数量高于平均水平的订单](/solution/1800-1899/1867.Orders%20With%20Maximum%20Quantity%20Above%20Average/README.md)                                        | `数据库` | 中等 | 🔒   |
| 1873 | [计算特殊奖金](/solution/1800-1899/1873.Calculate%20Special%20Bonus/README.md)                                                                               | `数据库` | 简单 |      |
| 1875 | [将工资相同的雇员分组](/solution/1800-1899/1875.Group%20Employees%20of%20the%20Same%20Salary/README.md)                                                      | `数据库` | 中等 | 🔒   |
| 1890 | [2020年最后一次登录](/solution/1800-1899/1890.The%20Latest%20Login%20in%202020/README.md)                                                                    | `数据库` | 简单 |      |
| 1892 | [页面推荐Ⅱ](/solution/1800-1899/1892.Page%20Recommendations%20II/README.md)                                                                                  | `数据库` | 困难 | 🔒   |
| 1907 | [按分类统计薪水](/solution/1900-1999/1907.Count%20Salary%20Categories/README.md)                                                                             | `数据库` | 中等 |      |
| 1917 | [Leetcodify 好友推荐](/solution/1900-1999/1917.Leetcodify%20Friends%20Recommendations/README.md)                                                             | `数据库` | 困难 | 🔒   |
| 1919 | [兴趣相同的朋友](/solution/1900-1999/1919.Leetcodify%20Similar%20Friends/README.md)                                                                          | `数据库` | 困难 | 🔒   |
| 1934 | [确认率](/solution/1900-1999/1934.Confirmation%20Rate/README.md)                                                                                             | `数据库` | 中等 |      |
| 1939 | [主动请求确认消息的用户](/solution/1900-1999/1939.Users%20That%20Actively%20Request%20Confirmation%20Messages/README.md)                                     | `数据库` | 简单 | 🔒   |
| 1949 | [坚定的友谊](/solution/1900-1999/1949.Strong%20Friendship/README.md)                                                                                         | `数据库` | 中等 | 🔒   |
| 1951 | [查询具有最多共同关注者的所有两两结对组](/solution/1900-1999/1951.All%20the%20Pairs%20With%20the%20Maximum%20Number%20of%20Common%20Followers/README.md)     | `数据库` | 中等 | 🔒   |
| 1965 | [丢失信息的雇员](/solution/1900-1999/1965.Employees%20With%20Missing%20Information/README.md)                                                                | `数据库` | 简单 |      |
| 1972 | [同一天的第一个电话和最后一个电话](/solution/1900-1999/1972.First%20and%20Last%20Call%20On%20the%20Same%20Day/README.md)                                     | `数据库` | 困难 | 🔒   |
| 1978 | [上级经理已离职的公司员工](/solution/1900-1999/1978.Employees%20Whose%20Manager%20Left%20the%20Company/README.md)                                            | `数据库` | 简单 |      |
| 1988 | [找出每所学校的最低分数要求](/solution/1900-1999/1988.Find%20Cutoff%20Score%20for%20Each%20School/README.md)                                                 | `数据库` | 中等 | 🔒   |
| 1990 | [统计实验的数量](/solution/1900-1999/1990.Count%20the%20Number%20of%20Experiments/README.md)                                                                 | `数据库` | 中等 | 🔒   |
| 2004 | [职员招聘人数](/solution/2000-2099/2004.The%20Number%20of%20Seniors%20and%20Juniors%20to%20Join%20the%20Company/README.md)                                   | `数据库` | 困难 | 🔒   |
| 2010 | [职员招聘人数 II](/solution/2000-2099/2010.The%20Number%20of%20Seniors%20and%20Juniors%20to%20Join%20the%20Company%20II/README.md)                           | `数据库` | 困难 | 🔒   |
| 2020 | [无流量的帐户数](/solution/2000-2099/2020.Number%20of%20Accounts%20That%20Did%20Not%20Stream/README.md)                                                      | `数据库` | 中等 | 🔒   |
| 2026 | [低质量的问题](/solution/2000-2099/2026.Low-Quality%20Problems/README.md)                                                                                    | `数据库` | 简单 | 🔒   |
| 2041 | [面试中被录取的候选人](/solution/2000-2099/2041.Accepted%20Candidates%20From%20the%20Interviews/README.md)                                                   | `数据库` | 中等 | 🔒   |
| 2051 | [商店中每个成员的级别](/solution/2000-2099/2051.The%20Category%20of%20Each%20Member%20in%20the%20Store/README.md)                                            | `数据库` | 中等 | 🔒   |
| 2066 | [账户余额](/solution/2000-2099/2066.Account%20Balance/README.md)                                                                                             | `数据库` | 中等 | 🔒   |
| 2072 | [赢得比赛的大学](/solution/2000-2099/2072.The%20Winner%20University/README.md)                                                                               | `数据库` | 简单 | 🔒   |
| 2082 | [富有客户的数量](/solution/2000-2099/2082.The%20Number%20of%20Rich%20Customers/README.md)                                                                    | `数据库` | 简单 | 🔒   |
| 2084 | [为订单类型为 0 的客户删除类型为 1 的订单](/solution/2000-2099/2084.Drop%20Type%201%20Orders%20for%20Customers%20With%20Type%200%20Orders/README.md)         | `数据库` | 中等 | 🔒   |
| 2112 | [最繁忙的机场](/solution/2100-2199/2112.The%20Airport%20With%20the%20Most%20Traffic/README.md)                                                               | `数据库` | 中等 | 🔒   |
| 2118 | [建立方程](/solution/2100-2199/2118.Build%20the%20Equation/README.md)                                                                                        | `数据库` | 困难 | 🔒   |
| 2142 | [每辆车的乘客人数 I](/solution/2100-2199/2142.The%20Number%20of%20Passengers%20in%20Each%20Bus%20I/README.md)                                                | `数据库` | 中等 | 🔒   |
| 2153 | [每辆车的乘客人数 II](/solution/2100-2199/2153.The%20Number%20of%20Passengers%20in%20Each%20Bus%20II/README.md)                                              | `数据库` | 困难 | 🔒   |
| 2159 | [分别排序两列](/solution/2100-2199/2159.Order%20Two%20Columns%20Independently/README.md)                                                                     | `数据库` | 中等 | 🔒   |
| 2173 | [最多连胜的次数](/solution/2100-2199/2173.Longest%20Winning%20Streak/README.md)                                                                              | `数据库` | 困难 | 🔒   |
| 2175 | [世界排名的变化](/solution/2100-2199/2175.The%20Change%20in%20Global%20Rankings/README.md)                                                                   | `数据库` | 中等 | 🔒   |
| 2199 | [找到每篇文章的主题](/solution/2100-2199/2199.Finding%20the%20Topic%20of%20Each%20Post/README.md)                                                            | `数据库` | 困难 | 🔒   |
| 2205 | [有资格享受折扣的用户数量](/solution/2200-2299/2205.The%20Number%20of%20Users%20That%20Are%20Eligible%20for%20Discount/README.md)                            | `数据库` | 简单 | 🔒   |
| 2228 | [7 天内两次购买的用户](/solution/2200-2299/2228.Users%20With%20Two%20Purchases%20Within%20Seven%20Days/README.md)                                            | `数据库` | 中等 | 🔒   |
| 2230 | [查找可享受优惠的用户](/solution/2200-2299/2230.The%20Users%20That%20Are%20Eligible%20for%20Discount/README.md)                                              | `数据库` | 简单 | 🔒   |
| 2238 | [司机成为乘客的次数](/solution/2200-2299/2238.Number%20of%20Times%20a%20Driver%20Was%20a%20Passenger/README.md)                                              | `数据库` | 中等 | 🔒   |
| 2252 | [表的动态旋转](/solution/2200-2299/2252.Dynamic%20Pivoting%20of%20a%20Table/README.md)                                                                       | `数据库` | 困难 | 🔒   |
| 2253 | [动态取消表的旋转](/solution/2200-2299/2253.Dynamic%20Unpivoting%20of%20a%20Table/README.md)                                                                 | `数据库` | 困难 | 🔒   |
| 2292 | [连续两年有 3 个及以上订单的产品](/solution/2200-2299/2292.Products%20With%20Three%20or%20More%20Orders%20in%20Two%20Consecutive%20Years/README.md)          | `数据库` | 中等 | 🔒   |
| 2298 | [周末任务计数](/solution/2200-2299/2298.Tasks%20Count%20in%20the%20Weekend/README.md)                                                                        | `数据库` | 中等 | 🔒   |
| 2308 | [按性别排列表格](/solution/2300-2399/2308.Arrange%20Table%20by%20Gender/README.md)                                                                           | `数据库` | 中等 | 🔒   |
| 2314 | [每个城市最高气温的第一天](/solution/2300-2399/2314.The%20First%20Day%20of%20the%20Maximum%20Recorded%20Degree%20in%20Each%20City/README.md)                 | `数据库` | 中等 | 🔒   |
| 2324 | [产品销售分析 IV](/solution/2300-2399/2324.Product%20Sales%20Analysis%20IV/README.md)                                                                        | `数据库` | 中等 | 🔒   |
| 2329 | [产品销售分析Ⅴ](/solution/2300-2399/2329.Product%20Sales%20Analysis%20V/README.md)                                                                           | `数据库` | 简单 | 🔒   |
| 2339 | [联赛的所有比赛](/solution/2300-2399/2339.All%20the%20Matches%20of%20the%20League/README.md)                                                                 | `数据库` | 简单 | 🔒   |
| 2346 | [以百分比计算排名](/solution/2300-2399/2346.Compute%20the%20Rank%20as%20a%20Percentage/README.md)                                                            | `数据库` | 中等 | 🔒   |
| 2356 | [每位教师所教授的科目种类的数量](/solution/2300-2399/2356.Number%20of%20Unique%20Subjects%20Taught%20by%20Each%20Teacher/README.md)                          | `数据库` | 简单 |      |
| 2362 | [生成发票](/solution/2300-2399/2362.Generate%20the%20Invoice/README.md)                                                                                      | `数据库` | 困难 | 🔒   |
| 2372 | [计算每个销售人员的影响力](/solution/2300-2399/2372.Calculate%20the%20Influence%20of%20Each%20Salesperson/README.md)                                         | `数据库` | 中等 | 🔒   |
| 2377 | [整理奥运表](/solution/2300-2399/2377.Sort%20the%20Olympic%20Table/README.md)                                                                                | `数据库` | 简单 | 🔒   |
| 2388 | [将表中的空值更改为前一个值](/solution/2300-2399/2388.Change%20Null%20Values%20in%20a%20Table%20to%20the%20Previous%20Value/README.md)                       | `数据库` | 中等 | 🔒   |
| 2394 | [开除员工](/solution/2300-2399/2394.Employees%20With%20Deductions/README.md)                                                                                 | `数据库` | 中等 | 🔒   |
| 2474 | [购买量严格增加的客户](/solution/2400-2499/2474.Customers%20With%20Strictly%20Increasing%20Purchases/README.md)                                              | `数据库` | 困难 | 🔒   |
| 2480 | [形成化学键](/solution/2400-2499/2480.Form%20a%20Chemical%20Bond/README.md)                                                                                  | `数据库` | 简单 | 🔒   |
| 2494 | [合并在同一个大厅重叠的活动](/solution/2400-2499/2494.Merge%20Overlapping%20Events%20in%20the%20Same%20Hall/README.md)                                       | `数据库` | 困难 | 🔒   |
| 2504 | [把名字和职业联系起来](/solution/2500-2599/2504.Concatenate%20the%20Name%20and%20the%20Profession/README.md)                                                 | `数据库` | 简单 | 🔒   |
| 2668 | [查询员工当前薪水](/solution/2600-2699/2668.Find%20Latest%20Salaries/README.md)                                                                              | `数据库` | 简单 | 🔒   |
| 2669 | [统计 Spotify 排行榜上艺术家出现次数](/solution/2600-2699/2669.Count%20Artist%20Occurrences%20On%20Spotify%20Ranking%20List/README.md)                       | `数据库` | 简单 | 🔒   |
| 2686 | [即时食物配送 III](/solution/2600-2699/2686.Immediate%20Food%20Delivery%20III/README.md)                                                                     | `数据库` | 中等 | 🔒   |
| 2687 | [自行车的最后使用时间](/solution/2600-2699/2687.Bikes%20Last%20Time%20Used/README.md)                                                                        | `数据库` | 简单 | 🔒   |
| 2688 | [查找活跃用户](/solution/2600-2699/2688.Find%20Active%20Users/README.md)                                                                                     | `数据库` | 中等 | 🔒   |
| 2701 | [连续递增交易](/solution/2700-2799/2701.Consecutive%20Transactions%20with%20Increasing%20Amounts/README.md)                                                  | `数据库` | 困难 | 🔒   |
| 2720 | [受欢迎度百分比](/solution/2700-2799/2720.Popularity%20Percentage/README.md)                                                                                 | `数据库` | 困难 | 🔒   |
| 2738 | [统计文本中单词的出现次数](/solution/2700-2799/2738.Count%20Occurrences%20in%20Text/README.md)                                                               | `数据库` | 中等 | 🔒   |
| 2752 | [在连续天数上进行了最多交易次数的顾客](/solution/2700-2799/2752.Customers%20with%20Maximum%20Number%20of%20Transactions%20on%20Consecutive%20Days/README.md) | `数据库` | 困难 | 🔒   |
| 2783 | [航班入座率和等待名单分析](/solution/2700-2799/2783.Flight%20Occupancy%20and%20Waitlist%20Analysis/README.md)                                                | `数据库` | 中等 | 🔒   |
| 2793 | [航班机票状态](/solution/2700-2799/2793.Status%20of%20Flight%20Tickets/README.md)                                                                            |          | 困难 | 🔒   |
| 2820 | [选举结果](/solution/2800-2899/2820.Election%20Results/README.md)                                                                                            |          | 中等 | 🔒   |
| 2837 | [总旅行距离](/solution/2800-2899/2837.Total%20Traveled%20Distance/README.md)                                                                                 | `数据库` | 简单 | 🔒   |
| 2853 | [最高薪水差异](/solution/2800-2899/2853.Highest%20Salaries%20Difference/README.md)                                                                           | `数据库` | 简单 | 🔒   |
| 2854 | [滚动平均步数](/solution/2800-2899/2854.Rolling%20Average%20Steps/README.md)                                                                                 | `数据库` | 中等 | 🔒   |
| 2893 | [计算每个区间内的订单](/solution/2800-2899/2893.Calculate%20Orders%20Within%20Each%20Interval/README.md)                                                     | `数据库` | 中等 | 🔒   |
| 2922 | [市场分析 III](/solution/2900-2999/2922.Market%20Analysis%20III/README.md)                                                                                   | `数据库` | 中等 | 🔒   |
| 2978 | [对称坐标](/solution/2900-2999/2978.Symmetric%20Coordinates/README.md)                                                                                       | `数据库` | 中等 | 🔒   |
| 2984 | [找到每座城市的高峰通话时间](/solution/2900-2999/2984.Find%20Peak%20Calling%20Hours%20for%20Each%20City/README.md)                                           | `数据库` | 中等 | 🔒   |
| 2985 | [计算订单平均商品数量](/solution/2900-2999/2985.Calculate%20Compressed%20Mean/README.md)                                                                     | `数据库` | 简单 | 🔒   |
| 2986 | [找到第三笔交易](/solution/2900-2999/2986.Find%20Third%20Transaction/README.md)                                                                              | `数据库` | 中等 | 🔒   |
| 2987 | [寻找房价最贵的城市](/solution/2900-2999/2987.Find%20Expensive%20Cities/README.md)                                                                           | `数据库` | 简单 | 🔒   |
| 2988 | [最大部门的经理](/solution/2900-2999/2988.Manager%20of%20the%20Largest%20Department/README.md)                                                               | `数据库` | 中等 | 🔒   |
| 2989 | [班级表现](/solution/2900-2999/2989.Class%20Performance/README.md)                                                                                           | `数据库` | 中等 | 🔒   |
| 2990 | [贷款类型](/solution/2900-2999/2990.Loan%20Types/README.md)                                                                                                  | `数据库` | 简单 | 🔒   |
| 2991 | [最好的三家酒庄](/solution/2900-2999/2991.Top%20Three%20Wineries/README.md)                                                                                  | `数据库` | 困难 | 🔒   |
| 2993 | [发生在周五的交易 I](/solution/2900-2999/2993.Friday%20Purchases%20I/README.md)                                                                              | `数据库` | 中等 | 🔒   |
| 2994 | [发生在周五的交易 II](/solution/2900-2999/2994.Friday%20Purchases%20II/README.md)                                                                            | `数据库` | 困难 | 🔒   |
| 2995 | [观众变主播](/solution/2900-2999/2995.Viewers%20Turned%20Streamers/README.md)                                                                                | `数据库` | 困难 | 🔒   |
| 3050 | [披萨配料成本分析](/solution/3000-3099/3050.Pizza%20Toppings%20Cost%20Analysis/README.md)                                                                    | `数据库` | 中等 | 🔒   |
| 3051 | [寻找数据科学家职位的候选人](/solution/3000-3099/3051.Find%20Candidates%20for%20Data%20Scientist%20Position/README.md)                                       | `数据库` | 简单 | 🔒   |
| 3052 | [最大化商品](/solution/3000-3099/3052.Maximize%20Items/README.md)                                                                                            | `数据库` | 困难 | 🔒   |
| 3053 | [根据长度分类三角形](/solution/3000-3099/3053.Classifying%20Triangles%20by%20Lengths/README.md)                                                              | `数据库` | 简单 | 🔒   |
| 3054 | [二叉树节点](/solution/3000-3099/3054.Binary%20Tree%20Nodes/README.md)                                                                                       | `数据库` | 中等 | 🔒   |
| 3055 | [最高欺诈百分位数](/solution/3000-3099/3055.Top%20Percentile%20Fraud/README.md)                                                                              | `数据库` | 中等 | 🔒   |
| 3056 | [快照分析](/solution/3000-3099/3056.Snaps%20Analysis/README.md)                                                                                              | `数据库` | 中等 | 🔒   |
| 3057 | [员工项目分配](/solution/3000-3099/3057.Employees%20Project%20Allocation/README.md)                                                                          | `数据库` | 困难 | 🔒   |
| 3058 | [没有共同朋友的朋友](/solution/3000-3099/3058.Friends%20With%20No%20Mutual%20Friends/README.md)                                                              | `数据库` | 中等 | 🔒   |
| 3059 | [找到所有不同的邮件域名](/solution/3000-3099/3059.Find%20All%20Unique%20Email%20Domains/README.md)                                                           | `数据库` | 简单 | 🔒   |
| 3060 | [时间范围内的用户活动](/solution/3000-3099/3060.User%20Activities%20within%20Time%20Bounds/README.md)                                                        | `数据库` | 困难 | 🔒   |
| 3061 | [计算滞留雨水](/solution/3000-3099/3061.Calculate%20Trapping%20Rain%20Water/README.md)                                                                       | `数据库` | 困难 | 🔒   |
| 3087 | [查找热门话题标签](/solution/3000-3099/3087.Find%20Trending%20Hashtags/README.md)                                                                            | `数据库` | 中等 | 🔒   |
| 3089 | [查找突发行为](/solution/3000-3099/3089.Find%20Bursty%20Behavior/README.md)                                                                                  | `数据库` | 中等 | 🔒   |
| 3103 | [查找热门话题标签 II](/solution/3100-3199/3103.Find%20Trending%20Hashtags%20II/README.md)                                                                    | `数据库` | 困难 | 🔒   |
| 3118 | [发生在周五的交易 III](/solution/3100-3199/3118.Friday%20Purchase%20III/README.md)                                                                           | `数据库` | 中等 | 🔒   |
| 3124 | [查找最长的电话](/solution/3100-3199/3124.Find%20Longest%20Calls/README.md)                                                                                  | `数据库` | 中等 | 🔒   |
| 3126 | [服务器利用时间](/solution/3100-3199/3126.Server%20Utilization%20Time/README.md)                                                                             | `数据库` | 中等 | 🔒   |
| 3140 | [连续空余座位 II](/solution/3100-3199/3140.Consecutive%20Available%20Seats%20II/README.md)                                                                   | `数据库` | 中等 | 🔒   |
| 3150 | [无效的推文 II](/solution/3100-3199/3150.Invalid%20Tweets%20II/README.md)                                                                                    | `数据库` | 简单 | 🔒   |
| 3156 | [员工任务持续时间和并发任务](/solution/3100-3199/3156.Employee%20Task%20Duration%20and%20Concurrent%20Tasks/README.md)                                       | `数据库` | 困难 | 🔒   |
| 3166 | [计算停车费与时长](/solution/3100-3199/3166.Calculate%20Parking%20Fees%20and%20Duration/README.md)                                                           | `数据库` | 中等 | 🔒   |
| 3172 | [第二天验证](/solution/3100-3199/3172.Second%20Day%20Verification/README.md)                                                                                 | `数据库` | 简单 | 🔒   |
| 3182 | [查找得分最高的学生](/solution/3100-3199/3182.Find%20Top%20Scoring%20Students/README.md)                                                                     | `数据库` | 中等 | 🔒   |
| 3188 | [查找得分最高的学生 II](/solution/3100-3199/3188.Find%20Top%20Scoring%20Students%20II/README.md)                                                             | `数据库` | 困难 | 🔒   |
| 3198 | [查找每个州的城市](/solution/3100-3199/3198.Find%20Cities%20in%20Each%20State/README.md)                                                                     | `数据库` | 简单 | 🔒   |
| 3204 | [按位用户权限分析](/solution/3200-3299/3204.Bitwise%20User%20Permissions%20Analysis/README.md)                                                               | `数据库` | 中等 | 🔒   |
| 3214 | [同比增长率](/solution/3200-3299/3214.Year%20on%20Year%20Growth%20Rate/README.md)                                                                            | `数据库` | 困难 | 🔒   |
| 3220 | [奇数和偶数交易](/solution/3200-3299/3220.Odd%20and%20Even%20Transactions/README.md)                                                                         | `数据库` | 中等 |      |
| 3230 | [客户购买行为分析](/solution/3200-3299/3230.Customer%20Purchasing%20Behavior%20Analysis/README.md)                                                           | `数据库` | 中等 | 🔒   |
| 3236 | [首席执行官下属层级](/solution/3200-3299/3236.CEO%20Subordinate%20Hierarchy/README.md)                                                                       | `数据库` | 困难 | 🔒   |
| 3246 | [英超积分榜排名](/solution/3200-3299/3246.Premier%20League%20Table%20Ranking/README.md)                                                                      | `数据库` | 简单 | 🔒   |
| 3252 | [英超积分榜排名 II](/solution/3200-3299/3252.Premier%20League%20Table%20Ranking%20II/README.md)                                                              | `数据库` | 中等 | 🔒   |
| 3262 | [查找重叠的班次](/solution/3200-3299/3262.Find%20Overlapping%20Shifts/README.md)                                                                             | `数据库` | 中等 | 🔒   |
| 3268 | [查找重叠的班次 II](/solution/3200-3299/3268.Find%20Overlapping%20Shifts%20II/README.md)                                                                     | `数据库` | 困难 | 🔒   |
| 3278 | [寻找数据科学家职位的候选人 II](/solution/3200-3299/3278.Find%20Candidates%20for%20Data%20Scientist%20Position%20II/README.md)                               | `数据库` | 中等 | 🔒   |
| 3293 | [计算产品最终价格](/solution/3200-3299/3293.Calculate%20Product%20Final%20Price/README.md)                                                                   | `数据库` | 中等 | 🔒   |
| 3308 | [Find Top Performing Driver](/solution/3300-3399/3308.Find%20Top%20Performing%20Driver/README.md)                                                            | `数据库` | 中等 | 🔒   |
| 3322 | [英超积分榜排名 III](/solution/3300-3399/3322.Premier%20League%20Table%20Ranking%20III/README.md)                                                            |          | 中等 | 🔒   |

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