What statements are used in sql to revoke data operation permissions from users?

The statement in SQL to revoke data operation permissions is REVOKE, and the syntax is: REVOKE <Permissions> ON <Table name> FROM <User>.

Statement to revoke data operation permissions in SQL

In SQL, by using REVOKE statement can revoke the user's permission to operate data.

Syntax

<code>REVOKE <权限> ON <表名> FROM <用户></code>

Where:

• <Permissions>: The permission to be revoked, which can be SELECT, INSERT, UPDATE, DELETE or all permissions (ALL)
• <Table name>: The name of the table whose permissions are to be revoked
• <User>: The user whose permissions are to be revoked

Example

For example, to revoke user alice’s SELECT permissions on table customers, you can use the following statement:

<code>REVOKE SELECT ON customers FROM alice;</code>

NOTE

• REVOKE does not delete granted permissions, it only revokes them. If the user subsequently gains permission again, they will be able to access the data again.
• Be careful when using REVOKE as it is a destructive operation that may accidentally restrict user access to data.

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