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
