PostgreSQL 8.4.2 Documentation
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# 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.

## See Also

CREATE SEQUENCE, ALTER SEQUENCE

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