CONSTRAINT_COLUMN_USAGE (Transact-SQL)
Returns one row for each column in the current database that has a constraint defined on the column. 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 |
|---|---|---|
TABLE_CATALOG |
nvarchar(128) |
Table qualifier. |
TABLE_SCHEMA |
nvarchar(128) |
Name of schema that contains the table owner. |
TABLE_NAME |
nvarchar(128) |
Table name. |
COLUMN_NAME |
nvarchar(128) |
Column name. |
CONSTRAINT_CATALOG |
nvarchar(128) |
Constraint qualifier. |
CONSTRAINT_SCHEMA |
nvarchar(128) |
Name of schema that contains the constraint. |
CONSTRAINT_NAME |
nvarchar(128) |
Constraint name. |
See Also
Reference
System Views (Transact-SQL)
Information Schema Views (Transact-SQL)
sys.columns (Transact-SQL)
sys.objects (Transact-SQL)
sys.types (Transact-SQL)
sys.check_constraints (Transact-SQL)
sys.key_constraints (Transact-SQL)
sys.foreign_keys (Transact-SQL)
Other Resources
Querying the SQL Server System Catalog