如何編寫一個SQL Server查詢，該查詢給出了給定FK名稱的表名稱？

Question

我有這個FK：「fk_blahblah」

我想知道哪2個表與它有關。

我該如何編寫一個查詢來做到這一點？

Answer 1

該查詢返回所有你可能需要的信息...你可以添加一個WHERE子句來過濾特定FK名稱等

SELECT t.name AS tablename, 
     (SELECT cc.name FROM sys.columns AS cc, sys.tables AS tt WHERE tt.object_id = cc.object_id AND tt.object_id = fk.parent_object_id AND cc.column_id = fc.parent_column_id) AS column_name, 
     fc.constraint_column_id, fk.name AS fkname, 
     OBJECTPROPERTY(fk.object_id, 'CnstIsDisabled') AS is_disabled, OBJECTPROPERTY(fk.object_id, 'CnstIsNotTrusted') AS is_untrusted, 
     OBJECT_NAME(fk.referenced_object_id) AS referenced_table_name, 
     (SELECT cc.name FROM sys.columns AS cc, sys.tables AS tt WHERE tt.object_id = cc.object_id AND tt.object_id = fk.referenced_object_id AND cc.column_id = fc.referenced_column_id) AS referenced_column_name, 
     fk.update_referential_action, fk.delete_referential_action 
    FROM sys.foreign_keys fk 
     INNER JOIN sys.tables t ON fk.parent_object_id = t.object_id 
     INNER JOIN sys.columns as c ON t.object_id = c.object_id 
     INNER JOIN sys.foreign_key_columns AS fc ON c.column_id = fc.parent_column_id AND fc.constraint_object_id = fk.object_id AND fc.parent_object_id = fk.parent_object_id AND c.column_id = fc.parent_column_id 
ORDER BY t.name, fk.name, fc.constraint_column_id