SQL2000查询指定表的表结构、字段、主键、字段描述

以前写的查询工具只应用于2005和2008版本；但是一般的虚拟主机只支持Sql2000估计是为了统一用户的版本或者sql200很经典啊 ，简单实用，没那么多花哨的功能 ，呵呵，本人也很喜欢老系统。老软件。老思想

SQL2000查询指定表的表结构、字段、主键、字段描述（说明）、字段类型、字段默认值、字段长度等等：

--Begin

SELECT 表名=case when a.colorder=1 then d.name else '' end,

表说明=case when a.colorder=1 then isnull(f.value,'') 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 parent_obj=a.id 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],'')

FROM syscolumns a

left join systypes b on a.xusertype=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

left join sysproperties g on a.id=g.id and a.colid=g.smallid

left join sysproperties f on d.id=f.id and f.smallid=0

--where [email protected]

order by a.id,a.colorder

--END

SQL Server系统表的应用

--1：获取当前数据库中的所有用户表

select Name from sysobjects where xtype='u' and status>=0

--2：获取某一个表的所有字段

select name from syscolumns where id=object_id('表名')

--3：查看与某一个表相关的视图、存储过程、函数

select a.* from sysobjects a, syscomments b where a.id = b.id and b.text like '%表名%'

--4：查看当前数据库中所有存储过程

select name as 存储过程名称 from sysobjects where xtype='P'

--5：查询用户创建的所有数据库

Select * from master..sysdatabases D

where sid not in(select sid from master..syslogins where name='sa')

或者

select dbid, name AS DB_NAME from master..sysdatabases where sid <> 0x01

--6：查询某一个表的字段和数据类型

select column_name,data_type from information_schema.columns

where table_name = '表名'

--7:取得表字段的描述

select name, (select value from sysproperties where id = syscolumns.id and smallid=syscolumns.colid) as 描述from syscolumns where id=object_id('表名')

--8取得主键和自增字段（标识）

SELECT

           a.colorder,

           a.name,

           case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '标识字段' else '主键字段' end

           FROM syscolumns a

           where id=object_id(N'my_vote') --要查询的表名

            and( --标识字段

           COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1

           or --主键字段

           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

           ))))

           order by a.id,a.colorder

--9取主键

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