1 SELECT 2 (case when a.colorder=1 then d.name else '' end) as 表名,--如果表名相同就返回空 syscolumns(表字段信息表) a sysobjects d 3 a.colorder as 字段序号, 4 a.name as 字段名, 5 (case when COLUMNPROPERTY( a.id,a.name, 'IsIdentity' )=1 then '√' else '' end) as 标识, --返回IsIdentity的值，IsIdentity只有两个值：0、1 6 (case when (SELECT count(*) FROM sysobjects--查询主键 7 WHERE (name in 8 (SELECT name FROM sysindexes 9 WHERE (id = a.id) AND (indid in 10 (SELECT indid FROM sysindexkeys 11 WHERE (id = a.id) AND (colid in 12 (SELECT colid FROM syscolumns 13 WHERE (id = a.id) AND (name = a.name)) 14 ))))) 15 AND (xtype = 'PK' ))>0 then '√' else '' end) as 主键,--查询主键END 16 b.name as 类型, --systypes b 17 a.length as 占用字节数, 18 COLUMNPROPERTY(a.id,a.name,'PRECISION' ) as 长度, 19 isnull(COLUMNPROPERTY(a.id,a.name,'Scale' ),0) as 小数位数, 20 (case when a.isnullable=1 then '√' else '' end) as 允许空, 21 isnull(e.text,'' ) as 默认值, --syscomments e 22 isnull(g.[value],'' ) AS 字段说明 --sys.extended_properties g (字段信息表) 23 FROM syscolumns a left join systypes b 24 on a.xtype=b.xusertype 25 inner join sysobjects d 26 on a.id=d.id and d.xtype='U' and d.name<> 'dtproperties' 27 left join syscomments e 28 on a.cdefault=e.id 29 left join sys.extended_properties g 30 on a.id=g.major_id AND a.colid = g.minor_id 31 where d.name='systempara' --所要查询的表 32 order by a.id,a.colorder
select * from sys.extended_properties--字段信息表
select * from syscolumns--表字段信息表
select * from sysobjects where sysobjects.type='u'--数据库所有的用户创建的表的信息
select * from sysobjects where sysobjects.type='s'--数据库所有的系统表的信息
select * from syscomments --所有的触发器的东西
--COLUMNPROPERTY 返回有关列或过程参数的信息
随时随地看视频
