//////////////////查詢指定表外鍵約束
select
a.name as 約束名,
object_name(b.parent_object_id) as 外鍵表,
d.name as 外鍵列,
object_name(b.referenced_object_id) as 主健表,
c.name as 主鍵列
from sys.foreign_keys A
inner join sys.foreign_key_columns B on A.object_id=b.constraint_object_id
inner join sys.columns C on B.parent_object_id=C.object_id and B.parent_column_id=C.column_id 
inner join sys.columns D on B.referenced_object_id=d.object_id and B.referenced_column_id=D.column_id 
where object_name(B.referenced_object_id)=‘要查詢的表名‘;

sql查詢指定表外鍵約束