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sys.table_types (Transact-SQL)

Displays properties of user-defined table types. A table type is a type from which table variables or table-valued parameters could be declared. Each table type has a type_table_object_id that is a foreign key into the sys.objects catalog view. This id can be used for querying various catalog views, in a way similar to an object_id of a regular table, for discovering the structure of the table type such as its columns, constraints, etc.

Column name

Data type


<inherited columns>


For a list of columns that this view inherits, see sys.types (Transact-SQL).



Object identification number. This number is unique within a database.

The visibility of the metadata in catalog views is limited to securables that a user either owns or on which the user has been granted some permission. For more information, see Metadata Visibility Configuration.

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