# Updating Data

Change existing rows with UPDATE ... SET, always limited by a WHERE that you've tested first with a SELECT.

![Cheat sheet: Updating Data](https://fsdtrainingmedia.blob.core.windows.net/public/images/2026/11/0905700b8db64f15b807daaba342a2ac.webp)

- Category: SQL
- Level: Apprentice
- Tags: SET Clause, sql, t-sql, UPDATE
- Updated: November 3, 2026

Source: https://www.ask-codey.com/cheat-sheets/modifying-data-in-t-sql-updating-data-cheat-sheet