KEY_COLUMN_USAGE (Transact-SQL)
Returns one row for each column that is constrained as a key in the current database. 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 |
|---|---|---|
CONSTRAINT_CATALOG |
nvarchar(128) |
Constraint qualifier. |
CONSTRAINT_SCHEMA |
nvarchar(128) |
Name of schema that contains the constraint. |
CONSTRAINT_NAME |
nvarchar(128) |
Constraint name. |
TABLE_CATALOG |
nvarchar(128) |
Table qualifier. |
TABLE_SCHEMA |
nvarchar(128) |
Name of schema that contains the table. |
TABLE_NAME |
nvarchar(128) |
Table name. |
COLUMN_NAME |
nvarchar(128) |
Column name. |
ORDINAL_POSITION |
int |
Column ordinal position. |
See Also
Reference
System Views (Transact-SQL)
Information Schema Views (Transact-SQL)
sys.columns (Transact-SQL)
sys.indexes (Transact-SQL)
sys.objects (Transact-SQL)
sys.foreign_keys (Transact-SQL)
sys.key_constraints (Transact-SQL)
Other Resources
Querying the SQL Server System Catalog