| title | DROP SEQUENCE (Transact-SQL) | Microsoft Docs | ||
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| ms.date | 2015-10-28 | ||
| ms.prod | sql-non-specified | ||
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| ms.topic | language-reference | ||
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| ms.assetid | c25772d3-61af-4aa7-b58b-a6f67a793e3d | ||
| caps.latest.revision | 20 | ||
| author | BYHAM | ||
| ms.author | rickbyh | ||
| manager | jhubbard |
[!INCLUDEtsql-appliesto-ss2012-asdb-xxxx-xxx_md]
Removes a sequence object from the current database.
Transact-SQL Syntax Conventions
DROP SEQUENCE [ IF EXISTS ] { [ database_name . [ schema_name ] . | schema_name. ] sequence_name } [ ,...n ]
[ ; ]
IF EXISTS
| Applies to: [!INCLUDEssNoVersion] ([!INCLUDEssSQL15] through current version). |
Conditionally drops the sequence only if it already exists.
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.
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
Requires ALTER or CONTROL permission on the schema.
To audit DROP SEQUENCE, monitor the SCHEMA_OBJECT_CHANGE_GROUP.
The following example removes a sequence object named CountBy1 from the current database.
DROP SEQUENCE CountBy1 ;
GO
ALTER SEQUENCE (Transact-SQL)
CREATE SEQUENCE (Transact-SQL)
NEXT VALUE FOR (Transact-SQL)
Sequence Numbers