DROP SEQUENCE
Name
DROP SEQUENCE -- remove a sequence
Synopsis
DROP SEQUENCE [ IF EXISTS ] name [, ...] [ CASCADE | RESTRICT ]
Description
   DROP SEQUENCE removes sequence number
   generators. A sequence can only be dropped by its owner or a superuser.
  
Parameters
- 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.
      
Examples
   To remove the sequence serial:
DROP SEQUENCE serial;
Compatibility
   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.