column-domain-usage-transact-sql.md

title	COLUMN_DOMAIN_USAGE (Transact-SQL) | Microsoft Docs
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ms.date	03/15/2017
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f1_keywords	COLUMN_DOMAIN_USAGE_TSQL COLUMN_DOMAIN_USAGE
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COLUMN_DOMAIN_USAGE (Transact-SQL)

[!INCLUDEtsql-appliesto-ss2008-asdb-xxxx-xxx_md]

Returns one row for each column in the current database that has an alias data type. This information schema view returns information about the objects to which the current user has permissions.

To retrieve information from these views, specify the fully qualified name of **INFORMATION_SCHEMA.**view_name.

Column name	Data type	Description
DOMAIN_CATALOG	nvarchar(128)	Database in which the alias data type exists.
DOMAIN_SCHEMA	nvarchar(128)	Name of schema that contains the alias data type. ** Important ** Do not use INFORMATION_SCHEMA views to determine the schema of a data type. The only reliable way to find the schema of a type is to use the TYPEPROPERTY function.
DOMAIN_NAME	sysname	Alias data type.
TABLE_CATALOG	nvarchar(128)	Table qualifier.
TABLE_SCHEMA	nvarchar(128)	Table owner. ** Important ** Do not use INFORMATION_SCHEMA views to determine the schema of an object. The only reliable way to find the schema of a object is to query the sys.objects catalog view.
TABLE_NAME	sysname	Table in which the alias data type is used.
COLUMN_NAME	sysname	Column using the alias data type.

See Also

System Views (Transact-SQL)
Information Schema Views (Transact-SQL)
sys.objects (Transact-SQL)
sys.types (Transact-SQL)