sql server表外键查询

--本表外键
SELECT
f.name AS foreign_key_name
,OBJECT_NAME(f.parent_object_id) AS table_name
,COL_NAME(fc.parent_object_id, fc.parent_column_id) AS constraint_column_name
,OBJECT_NAME (f.referenced_object_id) AS referenced_object
,COL_NAME(fc.referenced_object_id, fc.referenced_column_id) AS referenced_column_name
,is_disabled
,delete_referential_action_desc
,update_referential_action_desc
FROM sys.foreign_keys AS f
INNER JOIN sys.foreign_key_columns AS fc
ON f.object_id = fc.constraint_object_id
WHERE f.parent_object_id = OBJECT_ID('table_name');


--外键被参考表
SELECT 主键列ID=b.rkey
    ,主键列名=(SELECT name FROM syscolumns WHERE colid=b.rkey AND id=b.rkeyid)
    ,外键表ID=b.fkeyid
    ,外键表名称=object_name(b.fkeyid)
    ,外键列ID=b.fkey
    ,外键列名=(SELECT name FROM syscolumns WHERE colid=b.fkey AND id=b.fkeyid)
    ,级联更新=ObjectProperty(a.id,'CnstIsUpdateCascade')
    ,级联删除=ObjectProperty(a.id,'CnstIsDeleteCascade')
FROM sysobjects a
    join sysforeignkeys b on a.id=b.constid
    join sysobjects c on a.parent_obj=c.id
where a.xtype='f' AND c.xtype='U'
    and object_name(b.rkeyid)='table_name'