笔记32 SQL2005 查询表结构

笔记32 SQL2005 查询表结构

 1 --SQL2005 查询表结构 
 2 SELECT   
 3 (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
 4      a.colorder as 字段序号,  
 5      a.name as 字段名,  
 6      (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
 7      (case when (SELECT count(*) FROM sysobjects--查询主键  
 8                      WHERE (name in   
 9                              (SELECT name FROM sysindexes   
10                              WHERE (id = a.id)   AND (indid in   
11                                      (SELECT indid FROM sysindexkeys  
12                                        WHERE (id = a.id) AND (colid in   
13                                          (SELECT colid FROM syscolumns  
14                                          WHERE (id = a.id) AND (name = a.name))  
15                          )))))   
16          AND (xtype = 'PK' ))>0 then '' else '' end) as 主键,--查询主键END  
17 b.name as 类型,   --systypes b
18 a.length as 占用字节数,  
19 COLUMNPROPERTY(a.id,a.name,'PRECISION' ) as    长度,  
20 isnull(COLUMNPROPERTY(a.id,a.name,'Scale' ),0) as 小数位数,  
21 (case when a.isnullable=1 then '' else '' end) as 允许空,  
22 isnull(e.text,'' ) as 默认值,   --syscomments e
23 isnull(g.[value],'' ) AS 字段说明    --sys.extended_properties g (字段信息表)
24 FROM syscolumns a left join systypes b   
25 on a.xtype=b.xusertype  
26 inner join sysobjects d   
27 on a.id=d.id and d.xtype='U' and d.name<> 'dtproperties'   
28 left join syscomments e  
29 on a.cdefault=e.id  
30 left join sys.extended_properties g  
31 on a.id=g.major_id AND a.colid = g.minor_id   
32      where d.name='systempara' --所要查询的表  
33 order by a.id,a.colorder  
34 
35 /*
36 select * from sys.extended_properties--字段信息表  
37 select * from syscolumns--表字段信息表  
38 select * from sysobjects where sysobjects.type='u' --数据库所有的用户创建的表的信息  
39 select * from sysobjects where sysobjects.type='s' --数据库所有的系统表的信息  
40 select * from syscomments --所有的触发器的东西  
41 --COLUMNPROPERTY 返回有关列或过程参数的信息
42 */

 

posted @ 2013-08-02 21:59 桦仔 阅读(...) 评论(...)  编辑 收藏