sys-computed-columns-transact-sql.md

title	sys.computed_columns (Transact-SQL)
description	sys.computed_columns (Transact-SQL)
author	rwestMSFT
ms.author	randolphwest
ms.date	05/25/2021
ms.prod	sql
ms.prod_service	database-engine, sql-database, synapse-analytics, pdw
ms.technology	system-objects
ms.topic	reference
f1_keywords	sys.computed_columns_TSQL sys.computed_columns computed_columns_TSQL computed_columns
helpviewer_keywords	sys.computed_columns catalog view
dev_langs	TSQL
ms.assetid	c962c619-e18f-4315-9251-8d9862462299
monikerRange	>=aps-pdw-2016||=azuresqldb-current||=azure-sqldw-latest||>=sql-server-2016||>=sql-server-linux-2017||=azuresqldb-mi-current

sys.computed_columns (Transact-SQL)

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

Contains a row for each column found in sys.columns that is a computed-column.

Column name	Data type	Description
<Inherited columns>		The sys.computed_columns view returns all columns in the sys.columns view. It also returns the additional columns described below. For a description of the columns that the sys.computed_columns view inherits from sys.columns, see sys.columns (Transact-SQL). The value of the is_computed column is always set to 1 in the sys.computed_columns view.
definition	nvarchar(max)	SQL text that defines this computed-column.
uses_database_collation	bit	1 = The column definition depends on the default collation of the database for correct evaluation; otherwise, 0. Such a dependency prevents changing the database default collation.
is_persisted	bit	Computed column is persisted.

Permissions

[!INCLUDEssCatViewPerm] For more information, see Metadata Visibility Configuration.

See Also

Object Catalog Views (Transact-SQL)
Catalog Views (Transact-SQL)