SQLServer 查询所有外键关联表信息

有时候需要清除一些数据，但是总会有一些外键关联多加阻拦，下面是一些外键关联查询，方便更快捷有效的查询到需要处理的外键信息。

一、外键信息

查询列从左到右分别是： 外键约束名，子表名，外键列名，父表名

 --外键信息
select fk.name fkname , ftable.name ftablename, cn.name fkcol, rtable.name ftablename,ObjectProperty(fk.id,'CnstIsUpdateCascade') updatCase,ObjectProperty(fk.id,'CnstIsDeleteCascade') deletCase from sysforeignkeys
join sysobjects fk
on sysforeignkeys.constid = fk.id
join sysobjects ftable
on sysforeignkeys.fkeyid = ftable.id
join sysobjects rtable
on sysforeignkeys.rkeyid = rtable.id
join syscolumns cn
on sysforeignkeys.fkeyid = cn.id and sysforeignkeys.fkey = cn.colid

二、外键被参考表

 1 --外键被参考表
 2 SELECT 主键列ID=b.rkey
 3 ,主键列名=(SELECT name FROM syscolumns WHERE colid=b.rkey AND id=b.rkeyid)
 4 ,外键表ID=b.fkeyid
 5 ,外键表名称=object_name(b.fkeyid)
 6 ,外键名称= c.name
 7 ,外键列ID=b.fkey
 8 ,外键列名=(SELECT name FROM syscolumns WHERE colid=b.fkey AND id=b.fkeyid)
 9 ,级联更新=ObjectProperty(a.id,'CnstIsUpdateCascade')
10 ,级联删除=ObjectProperty(a.id,'CnstIsDeleteCascade')
11 FROM sysobjects a
12 join sysforeignkeys b on a.id=b.constid
13 join sysobjects c on a.parent_obj=c.id
14 join syscolumns cn
15 on b.fkeyid = cn.id and b.fkey = cn.colid
16 where a.xtype='f' AND c.xtype='U'
17 and object_name(b.rkeyid)='dt_article'

三、外键详细信息

参考来源 http://technet.microsoft.com/zh-cn/library/ms190196(v=SQL.110).aspx

 1 --外键详细信息
 2 SELECT
 3 f.name AS foreign_key_name
 4 ,OBJECT_NAME(f.parent_object_id) AS table_name
 5 ,COL_NAME(fc.parent_object_id, fc.parent_column_id) AS constraint_column_name
 6 ,OBJECT_NAME (f.referenced_object_id) AS referenced_object
 7 ,COL_NAME(fc.referenced_object_id, fc.referenced_column_id) AS referenced_column_name
 8 ,is_disabled
 9 ,delete_referential_action_desc
10 ,update_referential_action_desc
11 FROM sys.foreign_keys AS f
12 INNER JOIN sys.foreign_key_columns AS fc
13 ON f.object_id = fc.constraint_object_id
14 WHERE f.parent_object_id = OBJECT_ID('test');

文章转载自：https://www.cnblogs.com/guanshan/p/guan131.html