Select * FROM dev_cpm.dbo.SysObjects Where XType='U' orDER BY Name
从左到右分别是: 外键约束名,子表名,外键列名,父表名
http://chenjianjx.iteye.com/blog/222267
select fk.name '外键约束名' , ftable.name '子表名', cn.name '外键列名', rtable.name '父表名' 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
获得表的主键名称
http://www.cnblogs.com/aspxphpjsprb/archive/2008/01/05/1026974.html
select 主键=a.name FROM syscolumns a join sysobjects b on a.id=b.id and b.xtype='U' and b.name<>'dtproperties' where exists ( SELECT 1 FROM sysobjects where xtype='PK' and name in ( SELECT name FROM sysindexes WHERE indid in ( SELECT indid FROM sysindexkeys WHERE id = a.id AND colid=a.colid ) ) ) and b.name='表名'
sql server 查询列名、列数据类型、列长度
http://bbs.csdn.net/topics/310217801
select o.name as tbname, c.name as columnname, t.name as typename, c.max_length from sys.tables as o join sys.columns as c on o.object_id=c.object_id join sys.types as t on c.system_type_id=t.system_type_id