DOMAINS (Transact-SQL)

THIS TOPIC APPLIES TO:yesSQL Server (starting with 2008)yesAzure SQL DatabasenoAzure SQL Data Warehouse noParallel Data Warehouse

Returns one row for each alias data type that can be accessed by the current user in the current database.

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 the 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.
DATA_TYPE sysname System-supplied data type.
CHARACTER_MAXIMUM_LENGTH int Maximum length, in characters, for binary data, character data, or text and image data.

-1 for xml and large-value type data. Otherwise, NULL is returned. For more information, see Data Types (Transact-SQL).
CHARACTER_OCTET_LENGTH int Maximum length, in bytes, for binary data, character data, or text and image data.

-1 for xml and large-value type data. Otherwise, NULL is returned.
COLLATION_CATALOG varchar(6) Always returns NULL.
COLLATION_SCHEMA varchar(3) Always returns NULL.
COLLATION_NAME nvarchar(128) Returns the unique name for the sort order if the column is character data or text data type. Otherwise, NULL is returned.
CHARACTER_SET_CATALOG varchar(6) Returns master. This indicates the database in which the character set is located, if the column is character data or text data type. Otherwise, NULL is returned.
CHARACTER_SET_SCHEMA varchar(3) Always returns NULL.
CHARACTER_SET_NAME nvarchar(128) Returns the unique name for the character set if this column is character data or text data type. Otherwise, NULL is returned.
NUMERIC_PRECISION tinyint Precision of approximate numeric data, exact numeric data, integer data, or monetary data. Otherwise, NULL is returned.
NUMERIC_PRECISION_RADIX smallint Precision radix of approximate numeric data, exact numeric data, integer data, or monetary data. Otherwise, NULL is returned.
NUMERIC_SCALE tinyint Scale of approximate numeric data, exact numeric data, integer data, or monetary data. Otherwise, NULL is returned.
DATETIME_PRECISION smallint Subtype code for datetime and ISO interval data type. For other data types, this column returns a NULL.
DOMAIN_DEFAULT nvarchar(4000) Actual text of the definition Transact-SQL statement.

See Also

System Views (Transact-SQL)
Information Schema Views (Transact-SQL)
sys.syscharsets (Transact-SQL)
sys.sql_modules (Transact-SQL)
sys.configurations (Transact-SQL)
sys.types (Transact-SQL)