与数据库的列信息有关

/*1.查询SQLSERVER中的所有数据库*/
use master
go
select * from sysdatabases where dbid>4/*where条件用来去掉系统数据库*/
go
/*2.查询SQLSERVER中的所有数据库(存储过程)*/
exec sp_helpdb
/*3.查询指定数据库中的表*/
use 数据库名
go
select * from sysobjects where xtype='u'/*where条件用来去掉系统表*/
go
/*4.显示当前数据库所有表的详细信息*/
use 数据库名
go
SELECT
表名=case when a.colorder=1 then d.name else '' end,
字段序号=a.colorder,
字段名=a.name,
标识=case when COLUMNPROPERTY(a.id,a.name,'IsIdentity')=1 then '√'else '' end,
主键=case when 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
         )
     )
)
then '√' else '' end,
类型=b.name,
占用字节数=a.length,
长度=COLUMNPROPERTY(a.id,a.name,'PRECISION'),
小数位数=isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0),
允许空=case when a.isnullable=1 then '√' else '' end,
默认值=isnull(e.text,''),
字段说明=isnull(g.[value],'')/*此列在绑定GridView时,如选择动态生成列,始终无法绑定.手动指定列后正常,原因不详*/
FROM syscolumns a
left join systypes b on a.xtype=b.xusertype
inner join sysobjects d on a.id=d.id and d.xtype='U' and d.name<>'dtproperties'
left join syscomments e on a.cdefault=e.id
//SQL2005中用left join sys.extended_properties g on a.id=g.major_id and a.colid=g.minor_id
left join sysproperties g on a.id=g.id and a.colid=g.smallid
where   d.name='要查询的表'
order by a.id,a.colorder
go