Revoking Privileges for All Users
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To revoke privileges granted to all users as PUBLIC, use REVOKE with PUBLIC. For example, the following statement revokes SELECT, INSERT, and UPDATE privileges on the DEPARTMENTS table for all users:
REVOKE SELECT, INSERT, UPDATE ON DEPARTMENTS FROM PUBLIC;
When this statement is executed, only the table’s owner retains full access privileges to DEPARTMENTS.
Important:
PUBLIC does not revoke privileges for stored procedures. PUBLIC cannot be used to strip privileges from users who were granted them as individual users.