查找数据库中的主外键关系SQL语句

SELECT f.name AS '关系名称',
　　　　OBJECT_NAME(f.parent_object_id) AS '表名称',
　　　　COL_NAME(fc.parent_object_id,fc.parent_column_id) AS '字段名称',
　　　　OBJECT_NAME (f.referenced_object_id) AS '关联表名称',
　　　　COL_NAME(fc.referenced_object_id,fc.referenced_column_id) AS '关联字段名称'
FROM sys.foreign_keys AS f
INNER JOIN sys.foreign_key_columns AS fc ON f.OBJECT_ID = fc.constraint_object_id

 

 

SELECT 主表名=object_name(b.rkeyid)
    ,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'