Sql語句查看表結構

快速查看表對的就說明，及表字段描述及字段類型

--表描述 
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  
 tbs.name='Warrant_BaseInfo';--表名 
  


--快速查看表結構 
SELECT  CASE WHEN col.colorder = 1 THEN obj.name 10                   ELSE ''  
             END AS 表名, 12         col.colorder AS 序號 , 13         col.name AS 列名 , 14         ISNULL(ep.[value], '') AS 列說明 , 15         t.name AS 數據類型 , 16         col.length AS 長度 , 17         ISNULL(COLUMNPROPERTY(col.id, col.name, 'Scale'), 0) AS 小數位數 , 18         CASE WHEN COLUMNPROPERTY(col.id, col.name, 'IsIdentity') = 1 THEN '√'  
             ELSE ''  
        END AS 標識 , 21         CASE WHEN EXISTS ( SELECT   1  
                           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'  
                           WHERE    sc.id = col.id 30                                     AND sc.colid = col.colid ) THEN '√'  
             ELSE ''  
        END AS 主鍵 , 33         CASE WHEN col.isnullable = 1 THEN '√'  
             ELSE ''  
        END AS 允許空 , 36         ISNULL(comm.text, '') AS 默認值 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'  
                                         AND obj.status >= 0  
        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'  
        LEFT  JOIN sys.extended_properties epTwo ON obj.id = epTwo.major_id 47                                                          AND epTwo.minor_id = 0  
                                                         AND epTwo.name = 'MS_Description'  
WHERE   obj.name = 'Ath_LoanApply_tbl'--表名 
ORDER BY col.colorder ;  

 

（1）
SELECT
表名=case when a.colorder=1 then d.name else '' end,
表說明=case when a.colorder=1 then isnull(f.value,'') else '' end,
字段序號=a.colorder,
字段名=a.name,
標識=case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '√'else '' end,
主鍵=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,
類型=b.name,
占用字節數=a.length,
長度=COLUMNPROPERTY(a.id,a.name,'PRECISION'),
小數位數=isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0),
允許空=case when a.isnullable=1 then '√'else '' end,
默認值=isnull(e.text,''),
字段說明=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='要查詢的表'   --如果只查詢指定表,加上此條件
order by a.id,a.colorder

（2）

SQL2000系統表的應用
--1：獲取當前數據庫中的所有用戶表

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

--2：獲取某一個表的所有字段

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

--3：查看與某一個表相關的視圖、存儲過程、函數

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

--4：查看當前數據庫中所有存儲過程

select name as 存儲過程名稱 from sysobjects where xtype='P'

--5：查詢用戶創建的所有數據庫

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：查詢某一個表的字段和數據類型

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')