Transact-SQL Reference
TABLE_CONSTRAINTS
Contains one row for each table constraint in the current database. This information schema view returns information about the objects to which the current user has permissions. The INFORMATION_SCHEMA.TABLE_CONSTRAINTS view is based on the sysobjects system table.
To retrieve information from these views, specify the fully qualified name of INFORMATION_SCHEMA view_name.
| Column name | Data type | Description |
|---|---|---|
| CONSTRAINT_CATALOG | nvarchar(128) | Constraint qualifier. |
| CONSTRAINT_SCHEMA | nvarchar(128) | Constraint owner. |
| CONSTRAINT_NAME | sysname | Constraint name. |
| TABLE_CATALOG | nvarchar(128) | Table qualifier. |
| TABLE_SCHEMA | nvarchar(128) | Table owner. |
| TABLE_NAME | sysname | Table name. |
| CONSTRAINT_TYPE | varchar(11) | Type of constraint. Can be CHECK, UNIQUE, PRIMARY KEY, or FOREIGN KEY. |
| IS_DEFERRABLE | varchar(2) | Specifies whether constraint checking is deferrable. Always returns NO. |
| INITIALLY_DEFERRED | varchar(2) | Specifies whether constraint checking is initially deferred. Always returns NO. |