In what situations is data deletion using the DELETE command used?

The DELETE command is used to remove data from a database. It is applied when it is necessary to delete one or more records that are no longer needed or are outdated.

Use cases:

• Deleting a user from the system when deleting an account.
• Cleaning up outdated or irrelevant data.
• Deleting related records during cascade deletion.

Example SQL query:

DELETE FROM Users WHERE UserId = 123;

It is important to use DELETE carefully to avoid deleting necessary data. Often, backups are made or transactions are used before deletion.