DROP SEQUENCE SQL - Language Statements DROP SEQUENCE remove a sequence DROP SEQUENCE DROP SEQUENCE [ IF EXISTS ] name [, ...] [ CASCADE | RESTRICT ] DROP SEQUENCE removes sequence number generators. IF EXISTS Do not throw an error if the sequence does not exist. A notice is issued in this case. name The name (optionally schema-qualified) of a sequence. CASCADE Automatically drop objects that depend on the sequence. RESTRICT Refuse to drop the sequence if any objects depend on it. This is the default. To remove the sequence serial: DROP SEQUENCE serial; DROP SEQUENCE conforms to the SQL standard, except that the standard only allows one sequence to be dropped per command, and apart from the IF EXISTS option, which is a PostgreSQL extension.