Access control

SQL REVOKE

Remove previously granted privileges where supported.

Availability: Common SQL with references for SQL standard, MySQL/MariaDB, PostgreSQL, SQL Server, SQLite and Oracle Database; syntax and feature support vary by engine and version.中文

Syntax

REVOKE privilege ON object FROM principal;

Examples

Example (standard-style syntax). Verify supported keywords in your database.

REVOKE UPDATE ON customers FROM app_reader;

SQLite-oriented variant; dialect behaviour may differ.

REVOKE UPDATE ON customers FROM app_reader;

Parameters, options and clauses

Option / clause	Description
`Principal`	Specify the user, role or other database principal.
`Privilege`	Choose permissions such as SELECT, INSERT, UPDATE or EXECUTE.
`ON object`	Set the database object or scope to which a privilege applies.
`TO / FROM`	Name a grantee for GRANT or a principal for REVOKE.
`WITH GRANT OPTION`	Allow onward grants where the database supports it.

Dialect references

Safety note

Review a command and its target before running it. Commands that alter files, services, accounts, disks, permissions or databases may be difficult to reverse. Test in a safe environment and keep backups.

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