schema-id-transact-sql.md

title	SCHEMA_ID (Transact-SQL) | Microsoft Docs
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ms.date	03/03/2017
ms.prod	sql-non-specified
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f1_keywords	SCHEMA_ID SCHEMA_ID_TSQL
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helpviewer_keywords	identification numbers [SQL Server], schemas schemas [SQL Server], IDs SCHEMA_ID function IDs [SQL Server], schemas default schema IDs
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SCHEMA_ID (Transact-SQL)

[!INCLUDEtsql-appliesto-ss2008-all_md]

Returns the schema ID associated with a schema name.

Transact-SQL Syntax Conventions

Syntax

-- Syntax for SQL Server, Azure SQL Database, Azure SQL Data Warehouse, Parallel Data Warehouse  
  
SCHEMA_ID ( [ schema_name ] )   

Arguments

Term	Definition
schema_name	Is the name of the schema. schema_name is a sysname. If schema_name is not specified, SCHEMA_ID will return the ID of the default schema of the caller.

Return Types

int

NULL will be returned if schema_name is not a valid schema.

Remarks

SCHEMA_ID will return IDs of system schemas and user-defined schemas. SCHEMA_ID can be called in a select list, in a WHERE clause, and anywhere an expression is allowed.

Examples

A. Returning the default schema ID of a caller

SELECT SCHEMA_ID();  
GO  

B. Returning the schema ID of a named schema

USE AdventureWorks2012;  
GO  
SELECT SCHEMA_ID('HumanResources');  
GO   

Examples: [!INCLUDEssSDWfull] and [!INCLUDEssPDW]

C. Returning the default schema ID of a caller

SELECT SCHEMA_ID();  

D. Returning the schema ID of a named schema

SELECT SCHEMA_ID('dbo');  

See Also

Metadata Functions (Transact-SQL)
SCHEMA_NAME (Transact-SQL)
sys.schemas (Transact-SQL)