schema-id-transact-sql.md

description	SCHEMA_ID (Transact-SQL)
title	SCHEMA_ID (Transact-SQL) | Microsoft Docs
ms.custom
ms.date	03/03/2017
ms.prod	sql
ms.prod_service	database-engine, sql-database, sql-data-warehouse, pdw
ms.reviewer
ms.technology	t-sql
ms.topic	reference
f1_keywords	SCHEMA_ID SCHEMA_ID_TSQL
dev_langs	TSQL
helpviewer_keywords	identification numbers [SQL Server], schemas schemas [SQL Server], IDs SCHEMA_ID function IDs [SQL Server], schemas default schema IDs
ms.assetid	c8e34df5-3eea-459f-ae40-050909ce9fda
author	julieMSFT
ms.author	jrasnick
monikerRange	>=aps-pdw-2016||=azuresqldb-current||=azure-sqldw-latest||>=sql-server-2016||>=sql-server-linux-2017||=azuresqldb-mi-current

SCHEMA_ID (Transact-SQL)

[!INCLUDE sql-asdb-asdbmi-asa-pdw]

Returns the schema ID associated with a schema name.

Transact-SQL Syntax Conventions

Syntax

SCHEMA_ID ( [ schema_name ] )   

[!INCLUDEsql-server-tsql-previous-offline-documentation]

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();  

B. 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)