DB_ID (Transact-SQL)
Returns the database identification (ID) number.
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Transact-SQL Syntax Conventions
Syntax
DB_ID ( [ 'database_name' ] )
Arguments
- 'database_name'
Is the database name used to return the corresponding database ID. database_name is sysname. If database_name is omitted, the current database ID is returned.
Return Types
int
Examples
A. Returning the database ID of the current database
The following example returns the database ID of the current database.
SELECT DB_ID() AS [Database ID];
GO
B. Returning the database ID of a specified database
The following example returns the database ID of the AdventureWorks database.
SELECT DB_ID(N'AdventureWorks') AS [Database ID];
GO
C. Using DB_ID to specify the value of a system function parameter
The following example uses DB_ID to return the database ID of the AdventureWorks database in the system function sys.dm_db_index_operational_stats. The function takes a database ID as the first parameter.
DECLARE @db_id smallint;
DECLARE @object_id int;
SET @db_id = DB_ID(N'AdventureWorks');
SET @object_id = OBJECT_ID(N'AdventureWorks.Person.Address');
IF @db_id IS NULL
BEGIN;
PRINT N'Invalid database';
END;
ELSE IF @object_id IS NULL
BEGIN;
PRINT N'Invalid object';
END;
ELSE
BEGIN;
SELECT * FROM sys.dm_db_index_operational_stats(@db_id, @object_id, NULL, NULL);
END;
GO
See Also
Reference
DB_NAME (Transact-SQL)
Metadata Functions (Transact-SQL)
sys.databases (Transact-SQL)
sys.dm_db_index_operational_stats