（1）
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 d.name=\'要查询的表\' --如果只查询指定表,加上此条件
order by a.id,a.colorder
（2）
SQL2000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\')