schema-id-transact-sql.md

title	SCHEMA_ID (Transact-SQL)
description	SCHEMA_ID (Transact-SQL)
author	MikeRayMSFT
ms.author	mikeray
ms.date	03/03/2017
ms.service	sql
ms.subservice	t-sql
ms.topic	reference
f1_keywords	SCHEMA_ID SCHEMA_ID_TSQL
helpviewer_keywords	identification numbers [SQL Server], schemas schemas [SQL Server], IDs SCHEMA_ID function IDs [SQL Server], schemas default schema IDs
dev_langs	TSQL
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.

:::image type="icon" source="../../includes/media/topic-link-icon.svg" border="false"::: 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)