正在作一个关于SQL SERVER数据库导入Excel文件的程序，要读取数据库中的列的信息，从网上找了很多资料，终于总结出来比较理想的sql语句，执行后返回的列分别是：表名、列名、列类型、列长度、列描述、是否主键，语句如下：

SELECT SysObjects.Name as tb_name, SysColumns.Name as col_name, SysTypes.Name as col_type, SysColumns.Length as col_len, isnull(SysProperties.Value,SysColumns.Name) as col_memo,
case when SysColumns.name in
(select 主键=a.name
FROM syscolumns a
 inner 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=SysObjects.Name
)
 then 1 else 0 end as is_key

 FROM SysObjects,SysTypes,SysColumns
LEFT JOIN SysProperties ON (Syscolumns.Id = Sysproperties.Id AND
 Syscolumns.Colid = Sysproperties.Smallid)

 WHERE (Sysobjects.Xtype =''''u'''' OR Sysobjects.Xtype =''''v'''')
AND Sysobjects.Id = Syscolumns.Id AND SysTypes.XType = Syscolumns.XType
AND SysTypes.Name <> ''''sysname'''' AND Sysobjects.Name Like ''''%'''' ORDER By SysObjects.Name, SysColumns.colid

如果只想操作一个表的，那么把最后的％换成表名就可以了。

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我的blog：http://blog.csdn.net/guanvee