SQL×Ô¶¯Éú³ÉʵÌåÀà
declare @tablename varchar(20)
select @tablename = 'o_ems'
-------------Éú³É±äÁ¿,ʹÓñí¸ñÐÎʽ(ctrl + D)Êä³ö£¬È¡µÚÒ»¸ö×ֶεÄÖµ----------------------------------
select 'private '+
Case when t.name='varchar' Then 'string'
when t.name='char' Then 'string'
when t.name='datetime' Then 'datetime'
when t.name='int ' Then 'int'
when t.name='smallint' Then 'int'
when t.name='money' Then 'float'
when t.name='decimal' Then 'decimal'
when t.name='tinyint' Then 'byte'
else t.name end
+ ' _'+upper(substring(c.name,1,1))+lower(substring(c.name,2,(len(c.name)-1)))+';' as name /*,o.name,t.name,c.length,c.* ,isnull(m.text,'') */
from syscolumns c inner join sysobjects o on o.id=c.id
inner join systypes t on c.xtype=t.xtype
left outer join syscomments m on c.cdefault=m.id
where o.name =@tablename
order by c.id
-------------Éú³É·½·¨£¬Ê¹ÓÃÎı¾ÐÎʽ(ctrl + T)Êä³ö----------------------------------
select '/// <summary>' +char(13)+char(10)+'///'+char(13)+char(10)+'/// <summary>'+char(13)+char(10)
+ 'public '+ Case when t.name='varchar' Then 'string'
when t.name='char' Then 'string'
when t.name='datetime' Then 'datetime'
when t.name='int' Then 'int'
when t.name='smallint' Then 'int'
when t.name='money' Then 'float'
when t.name='decimal' Then 'decimal'
when t.name='tinyint' Then 'byte'
else t.name end
+ ' ' +upper(substring(c.name,1,1))+lower(substring(c.name,2,(len(c.name)-1)))+char(13)+char(10)
+ '{' +char(13)
Ïà¹ØÎĵµ£º
DECLARE @sql varchar(8000)
--ÏÂÃæÊÇɾ³ý15Ììǰ±¸·ÝÎļþµÄ´¦Àí
set @sql='Del E:\Databasebackup\'
@sql=@sql +rtrim(convert(varchar,getdate()-15,112))+'.bak'
Exec master..xp_cmdshell @sql
DECLARE @DelFile Varchar(256)
set ......
¾µäSQLÓï¾ä´óÈ«
ÏÂÁÐÓï¾ä²¿·ÖÊÇMssqlÓï¾ä£¬²»¿ÉÒÔÔÚaccessÖÐʹÓá£
¡¡¡¡SQL·ÖÀࣺ
¡¡¡¡DDL—Êý¾Ý¶¨ÒåÓïÑÔ(CREATE£¬ALTER£¬DROP£¬DECLARE)
¡¡¡¡DML—Êý¾Ý²Ù×ÝÓïÑÔ(SELECT£¬DELETE£¬UPDATE£¬INSERT)
¡¡¡¡DCL—Êý¾Ý¿ØÖÆÓïÑÔ(GRANT£¬REVOKE£¬COMMIT£¬ROLLBACK)
¡¡¡¡Ê×ÏÈ,¼òÒª½éÉÜ»ù´¡Óï¾ä£º
¡¡¡¡1¡¢Ë ......
.PivotµÄÓ÷¨Ìå»á:
Óï¾ä·¶Àý:
select PN,[2006/5/30] as [20060530],[2006/6/2] as [20060602]
from consumptiondata a
Pivot (sum(a.M_qty) FOR a.M_date in ([2006/5/30],[2006/6/2])) as PVT
order by PN
Table½á¹¹ Consumptiondata (PN,M_Date,M_qty)
order by PN¿ÉÒª¿É²»Òª,²¢²»ÖØ ......
ÉêÃ÷¡£ÎÄÕ½ö´ú±í¸öÈ˹۵㣬ÓëËùÔÚ¹«Ë¾ÎÞÈκÎÁªÏµ¡£
1. ¸ÅÊö
ÍøÒ³¹ÒÂíÕâ¸ö»°ÌâÏëÀ´´ó¼Ò²¢²»Ä°Éú¡£ÎªÊ²Ã´ÓÐÕâô¶àµÄÍøÒ³ÉÏ´æÔÚ×ÅľÂíÈ¥¹¥»÷ÆÕͨÓû§£¿²»¿É·ñÈÏ£¬Ï൱һ²¿·ÖÍøÒ³Ô±¾¾ÍÊǶñÒâµÄ£ºÍøÒ³µÄ×÷Õß¹ÊÒâÔÚÉÏÃæ·ÅÉÏľÂí£¬È»ºóͨ¹ý¸÷ÖÖÊÖ¶ÎÒýÓÕÓû§È¥ä¯ÀÀ¡£µ«ÊǾø´ó¶àÊý±»¹ÒÂíµÄÍøÒ³Ô±¾ÊÇÕý³ ......
TRUNCATE TABLE ÔÚ¹¦ÄÜÉÏÓë²»´ø Where ×Ó¾äµÄ Delete
Óï¾äÏàͬ£º¶þÕß¾ùɾ³ý±íÖеÄÈ«²¿ÐС£µ« TRUNCATE TABLE ±È Delete Ëٶȿ죬ÇÒʹÓõÄϵͳºÍÊÂÎñÈÕÖ¾×ÊÔ´ÉÙ¡£
Delete
Óï¾äÿ´Îɾ³ýÒ»ÐУ¬²¢ÔÚÊÂÎñÈÕÖ¾ÖÐΪËùɾ³ýµÄÿÐмǼһÏî¡£TRUNCATE TABLE ͨ¹ýÊÍ·Å´æ´¢±íÊý¾ÝËùÓõÄÊý¾ÝÒ³À´É¾³ýÊý¾Ý£¬²¢ÇÒÖ»ÔÚÊÂÎñÈÕÖ¾ÖмÇÂ¼Ò ......