DROP SEQUENCE (Transact-SQL)

Removes a sequence object from the current database.

Transact-SQL Syntax Conventions

Syntax

DROP SEQUENCE { [ database_name . [ schema_name ] . | schema_name. ]    sequence_name } [ ,...n ]
 [ ; ]

Arguments

• database_name
  Is the name of the database in which the sequence object was created.

• schema_name
  Is the name of the schema to which the sequence object belongs.

• sequence_name
  Is the name of the sequence to be dropped. Type is sysname.

Remarks

After generating a number, a sequence object has no continuing relationship to the number it generated, so the sequence object can be dropped, even though the number generated is still in use.

A sequence object can be dropped while it is referenced by a stored procedure, or trigger, because it is not schema bound. A sequence object cannot be dropped if it is referenced as a default value in a table. The error message will list the object referencing the sequence.

To list all sequence objects in the database, execute the following statement.

SELECT sch.name + '.' + seq.name AS [Sequence schema and name] 
    FROM sys.sequences AS seq
    JOIN sys.schemas AS sch
        ON seq.schema_id = sch.schema_id ;
GO

Security

Permissions

Requires ALTER or CONTROL permission on the schema.

Audit

To audit DROP SEQUENCE, monitor the SCHEMA_OBJECT_CHANGE_GROUP.

Examples

The following example removes a sequence object named CountBy1 from the current database.

DROP SEQUENCE CountBy1 ;
GO

See Also

Reference

ALTER SEQUENCE (Transact-SQL)

CREATE SEQUENCE (Transact-SQL)

NEXT VALUE FOR (Transact-SQL)

Concepts

Sequence Numbers