Computer Science for IGCSE & O level - Databases (Section 3 - No. 41)

What does the 'ALTER TABLE' command do in SQL?

Deletes a table from the database.

Modifies the structure of an existing table.

Inserts data into a table.

Retrieves data from a table.

ALTER TABLE is used to modify the structure of an existing table, such as adding or removing columns, or changing data types.