快速查看表对的就说明，及表字段描述及字段类型
1 --表描述 2 SELECT tbs.name 表名,ds.value 描述 3 FROM sys.extended_properties ds 4 LEFT JOIN sysobjects tbs ON ds.major_id=tbs.id 5 WHERE ds.minor_id=0 and 6 tbs.name=\'Warrant_BaseInfo\';--表名 7
8 --快速查看表结构 9 SELECT CASE WHEN col.colorder = 1 THEN obj.name 10 ELSE \'\' 11 END AS 表名, 12 col.colorder AS 序号 , 13 col.name AS 列名 , 14 ISNULL(ep.[value], \'\') AS 列说明 , 15 t.name AS 数据类型 , 16 col.length AS 长度 , 17 ISNULL(COLUMNPROPERTY(col.id, col.name, \'Scale\'), 0) AS 小数位数 , 18 CASE WHEN COLUMNPROPERTY(col.id, col.name, \'IsIdentity\') = 1 THEN \'√\' 19 ELSE \'\' 20 END AS 标识 , 21 CASE WHEN EXISTS ( SELECT 1 22 FROM dbo.sysindexes si 23 INNER JOIN dbo.sysindexkeys sik ON si.id = sik.id 24 AND si.indid = sik.indid 25 INNER JOIN dbo.syscolumns sc ON sc.id = sik.id 26 AND sc.colid = sik.colid 27 INNER JOIN dbo.sysobjects so ON so.name = si.name 28 AND so.xtype = \'PK\' 29 WHERE sc.id = col.id 30 AND sc.colid = col.colid ) THEN \'√\' 31 ELSE \'\' 32 END AS 主键 , 33 CASE WHEN col.isnullable = 1 THEN \'√\' 34 ELSE \'\' 35 END AS 允许空 , 36 ISNULL(comm.text, \'\') AS 默认值 37 FROM dbo.syscolumns col 38 LEFT JOIN dbo.systypes t ON col.xtype = t.xusertype 39 inner JOIN dbo.sysobjects obj ON col.id = obj.id 40 AND obj.xtype = \'U\' 41 AND obj.status >= 0 42 LEFT JOIN dbo.syscomments comm ON col.cdefault = comm.id 43 LEFT JOIN sys.extended_properties ep ON col.id = ep.major_id 44 AND col.colid = ep.minor_id 45 AND ep.name = \'MS_Description\' 46 LEFT JOIN sys.extended_properties epTwo ON obj.id = epTwo.major_id 47 AND epTwo.minor_id = 0 48 AND epTwo.name = \'MS_Description\' 49 WHERE obj.name = \'Ath_LoanApply_tbl\'--表名 50 ORDER BY col.colorder ;
（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\')