[{"pid": 1, "pname": "apple", "price": 5, "num": 100, "pdate": "2020-1-1"}, {"pid": 2, "pname": "banana", "price": 3, "num": 300, "pdate": "2020-1-3"}, {"pid": 3, "pname": "orange", "price": 4, "num": 150, "pdate": "2020-1-3"}]