今天整理资料时看到有这样一个查询数据库中的表和字段信息的语句，很强! 就是忘了当初谁写的了，印像中该是邹建所创。也贴出来以后备用吧。

1SELECT
2表名 = CASE a.colorder WHEN 1 THEN c.name ELSE '' END,
3序 = a.colorder,
4字段名 = a.name,
5标识 = CASE COLUMNPROPERTY(a.id,a.name,'IsIdentity') WHEN 1 THEN '√' ELSE '' END,
6主键 = CASE
7WHEN EXISTS (
8SELECT *
9FROM sysobjects
10WHERE xtype='PK' AND name IN (
11SELECT name
12FROM sysindexes
13WHERE id=a.id AND indid IN (
14SELECT indid
15FROM sysindexkeys
16WHERE id=a.id AND colid IN (
17SELECT colid
18FROM syscolumns
19WHERE id=a.id AND name=a.name
20)
21)
22)
23)
24THEN '√'
25ELSE ''
26END,
27类型 = b.name,
28字节数 = a.length,
29长度 = COLUMNPROPERTY(a.id,a.name,'Precision'),
30小数 = CASE ISNULL(COLUMNPROPERTY(a.id,a.name,'Scale'),0)
31WHEN 0 THEN ''
32ELSE CAST(COLUMNPROPERTY(a.id,a.name,'Scale') AS VARCHAR)
33END,
34允许空 = CASE a.isnullable WHEN 1 THEN '√' ELSE '' END,
35默认值 = ISNULL(d.[text],''),
36说明 = ISNULL(e.[value],'')
37FROM syscolumns a
38LEFT JOIN systypes b ON a.xtype=b.xusertype
39INNER JOIN sysobjects c ON a.id=c.id AND c.xtype='U' AND c.name<>'dtproperties'
40LEFT JOIN syscomments d ON a.cdefault=d.id
41LEFT JOIN sysproperties e ON a.id=e.id AND a.colid=e.smallid
42ORDER BY c.name, a.colorder

我修改一下，变个精简版本的：

1
2select a.name, b.xtype,b.name
3from syscolumns a
4inner JOIN systypes b
5ON a.xtype=b.xusertype
6inner join sysobjects c ON
7a.id=c.id AND c.xtype='U' AND c.name<>'dtproperties' where c.name = 表名

来源:网络