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db-id-transact-sql.md

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title DB_ID (Transact-SQL) | Microsoft Docs
ms.custom
ms.date 03/09/2017
ms.prod sql-non-specified
ms.reviewer
ms.suite
ms.technology
database-engine
ms.tgt_pltfrm
ms.topic language-reference
f1_keywords
DB_ID_TSQL
DB_ID
dev_langs
TSQL
helpviewer_keywords
viewing database ID numbers
IDs [SQL Server], databases
database IDs [SQL Server]
identification numbers [SQL Server], databases
displaying database ID numbers
DB_ID function
ms.assetid 7b3aef89-a6fd-4144-b468-bf87ebf381b8
caps.latest.revision 39
author BYHAM
ms.author rickbyh
manager jhubbard

DB_ID (Transact-SQL)

[!INCLUDEtsql-appliesto-ss2008-all_md]

Returns the database identification (ID) number.

Topic link icon Transact-SQL Syntax Conventions

Syntax

-- Syntax for SQL Server, Azure SQL Database, Azure SQL Data Warehouse, Parallel Data Warehouse  
  
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

Permissions

If the caller of DB)ID is not the owner of the database and the database is not master or tempdb, the minimum permissions required to see the corresponding row are ALTER ANY DATABASE or VIEW ANY DATABASE server-level permission, or CREATE DATABASE permission in the master database. The database to which the caller is connected can always be viewed in sys.databases.

Important

By default, the public role has the VIEW ANY DATABASE permission, allowing all logins to see database information. To block a login from the ability to detect a database, REVOKE the VIEW ANY DATABASE permission from public, or DENY the VIEW ANY DATABASE permission for individual logins.

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 [!INCLUDEssSampleDBobject] database.

SELECT DB_ID(N'AdventureWorks2008R2') 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 [!INCLUDEssSampleDBobject] database in the system function sys.dm_db_index_operational_stats. The function takes a database ID as the first parameter.

DECLARE @db_id int;  
DECLARE @object_id int;  
SET @db_id = DB_ID(N'AdventureWorks2012');  
SET @object_id = OBJECT_ID(N'AdventureWorks2012.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

Examples: [!INCLUDEssSDWfull] and [!INCLUDEssPDW]

D. Return the ID of the current database

The following example returns the database ID of the current database.

SELECT DB_ID();

E. Return the ID of a named database.

The following example returns the database ID of the AdventureWorksDW2012 database.

SELECT DB_ID('AdventureWorksPDW2012');

See Also

DB_NAME (Transact-SQL)
Metadata Functions (Transact-SQL)
sys.databases (Transact-SQL)
sys.dm_db_index_operational_stats (Transact-SQL)