---
title: Define columns to generate data
description: Provide detailed definitions to preview a test for each column that you want the data to generate the results for.
locale: en-US
canonical_url: https://www.servicenow.com/docs/r/australia/intelligent-experiences/now-assist-data-kit/na-data-kit-define-columns.html
release: australia
product: Now Assist Data Kit
classification: now-assist-data-kit
topic_type: task
last_updated: "2026-03-12"
reading_time_minutes: 1
breadcrumb: [Generate synthetic data, Using AI Data Kit, AI Data Kit, Enable AI experiences]
---

# Define columns to generate data

Provide detailed definitions to preview a test for each column that you want the data to generate the results for.

## Before you begin

Role required: sn\_data\_kit.admin

## About this task

For better quality data, use fewer than 20 columns.

## Procedure

1.  Enter a description for each column that you want to generate data for.

    Describe the columns for the large language model \(LLM\) to generate values accordingly. This description can include a range and any rules or limitations to be considered.

2.  Enable one column as the key column.

    The key column is required and used as a baseline for creating data in other columns.

3.  Select **Continue**.

    The test generation page opens.

4.  Navigate to **Test generation** to preview a small number of records before generating a full dataset.

5.  Select the records to generate for testing.

6.  Select **Start testing**.

    You see the preview generation data results page. If you want more refined results, navigate to **Define data** or **Select sample data** to update the criteria.

7.  Select **Start generation**.

    The generated data is completed.