Is there a query that will get me foreign keys directed at a specific table column? For example, say I had these three tables:
__________
|Table A |
----------
|Id |
----------
___________
|Table B |
-----------
|Id |
|TableAId | (Foreign Key to TableA.Id)
-----------
___________
|Table C |
-----------
|Id |
|TableAId | (Foreign Key to TableA.Id)
-----------
I need a query along the lines of "Select * Foreign Keys directed at TableA.Id" that returned "Table C: TableAId", "Table B: TableAId". I'm browsing through some of the INFORMATION_SCHEMA system views, and it seems like I can easily see what foreign keys belong to Table A, or Table B individually, but I can't find where it says "Table C has a foreign key to Table A" specifically. I can figure out the specifics of the query, I just can't find the views I'm looking for (or I'm glossing over them). Any help would be appreciated.
To see foreign key relationships of a table: SELECT TABLE_NAME, COLUMN_NAME, CONSTRAINT_NAME, REFERENCED_TABLE_NAME, REFERENCED_COLUMN_NAME FROM INFORMATION_SCHEMA. KEY_COLUMN_USAGE WHERE REFERENCED_TABLE_SCHEMA = 'db_name' AND REFERENCED_TABLE_NAME = 'table_name';
Courtesy of Pinal Dave:
SELECT
f.name AS ForeignKey,
OBJECT_NAME(f.parent_object_id) AS TableName,
COL_NAME(fc.parent_object_id,
fc.parent_column_id) AS ColumnName,
OBJECT_NAME (f.referenced_object_id) AS ReferenceTableName,
COL_NAME(fc.referenced_object_id,
fc.referenced_column_id) AS ReferenceColumnName
FROM
sys.foreign_keys AS f
INNER JOIN sys.foreign_key_columns AS fc ON f.OBJECT_ID = fc.constraint_object_id
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