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Database · SQL and Database Administration

SQL ALTER TABLE — Run with timestamp

Print a timestamp immediately before running the command. Base task: Alter a table definition.

Copy-ready commandSQL ALTER TABLE — Run with timestamp
date --iso-8601=seconds; ALTER TABLE users ADD COLUMN last_login DATETIME NULL
Production warning

INSERT, UPDATE, DELETE, ALTER, and restore operations can modify or remove data.

Requirements and permissions

Requirements
Appropriate database client and connection
Permissions
Database privileges vary
Last reviewed
2026-08-01

Examples

Run with timestamp

Print a timestamp immediately before running the command.

date --iso-8601=seconds; ALTER TABLE users ADD COLUMN last_login DATETIME NULL

Common errors

Command or option not supported

Confirm the installed platform version supports the base command and the added output or wrapper option.

Access denied or insufficient privileges

Run with the administrative role or delegated permission required by the underlying command.