SQLÖÐÈçºÎÓÃÒ»¸ö±í¸üÐÂÁíÒ»¸ö±í
	
    
    
	for ACCESS :
update a, b set a.name=b.name1 where a.id=b.id
for SQL Server:
"update a set a.name=b.name1 from a,b where a.id=b.id"
update   a   set   a.status=b.status   
  from   table1   a,table2   b   
  where   a.id1=b.id1   
update a inner join b on a.a1=b.b1 set a.a2=b.b2Ìõ¼þ
update   table1   set   a.status   =   b.status   
  from   table1   a   inner   join   table2   b     
  on   a.idl   =   b.idl
http://topic.csdn.net/t/20041013/14/3451961.html
http://www.cnblogs.com/hanguoji/archive/2007/02/01/636723.aspx
    
     
	
	
    
    
	Ïà¹ØÎĵµ£º
        
    
    ±íÖÐÖ÷¼ü±ØÐëΪ±êʶÁУ¬[ID] int IDENTITY (1,1) 
1.·ÖÒ³·½°¸Ò»£º(ÀûÓÃNot InºÍSELECT TOP·ÖÒ³) 
Óï¾äÐÎʽ£º  
SELECT TOP Ò³¼Ç¼ÊýÁ¿ * 
from ±íÃû 
WHERE (ID NOT IN 
  (SELECT TOP (ÿҳÐÐÊý*(Ò³Êý-1)) ID 
  from ±íÃû 
  ORDER BY ID)) 
  ORDER BY ID 
//×Ô¼º»¹¿ÉÒÔ¼ÓÉÏһЩ²éѯ ......
	
    
        
    
    LINQ to sqlËäÈ»½«Êý¾Ý¿â²Ù×÷ºÍÒµÎñÂß¼¸ôÀ뿪À´£¬Ê¹¿ª·¢ÈËÔ±Äܹ»Ê¹Óõ¥Ò»µÄÓïÑÔºÍ֪ʶÄܹ»·½±ãµÄ²Ù×÷Êý¾Ý¿â²¢´¦ÀíÒµÎñÂß¼¡£µ«ÊÇÕâ±Ï¾¹ÊÇ΢ÈíO/R½â¾ö·½°¸µÄµÚÒ»¸ö°æ±¾£¬Ïà±ÈÏà¶Ô³ÉÊìµÄDataSetÊý¾Ý¼¯½â¾ö·½°¸À´Ëµ£¬ÎÒÃÇ»¹ÊÇ¿ÉÒÔ¿´µ½Ò»Ð©²»×ã¡£
¡¡¡¡Ê×ÏÈ£¬ÎÒÃÇ×¢Òâµ½ËùÓеÄÊý¾ÝʵÌ岢ûÓдÓÒ»¸ö»ùÀàÖÐÅÉÉú£¬ÕâʹµÃ¸ø¿ª·¢Í¨Ó ......
	
    
        
    
    alter table ±íÃû
add constraint Ô¼ÊøÃû
foreign key(×Ö¶ÎÃû) references Ö÷±íÃû(×Ö¶ÎÃû)
on delete cascade
Óï·¨£º
Foreign Key
(column[,...n])
references referenced_table_name[(ref_column[,...n])]
[on delete cascade]
[on update cascade]
×¢ÊÍ£º
column:ÁÐÃû
referenced_table_name:Íâ¼ü²Î¿¼µÄÖ÷¼ü± ......
	
    
        
    
    sql serverºÍoracleÐÐתÁеÄÒ»ÖÖµäÐÍ·½·¨ 
ǰÑÔ£ºÍøÉÏÓв»ÉÙÎÄÕÂÊǽ²ÐÐתÁе쬵«ÊǴ󲿷ֶ¼ÊÇÖ±½ÓÌù´úÂ룬ºöÊÓÁËÖмä¹ý³Ì£¬±¾ÈË×Ô¼ºË¼¿¼ÁËÏÂΪʲôҪÕâÑùʵÏÖ£¬²¢ÇÒ×öÁËÈçϵıʼǣ¬¶ÔÓÐЩ¶®µÄÈËÀ´Ëµ¿ÉÄÜûÓмÛÖµ£¬Ï£Íû¶Ô»¹²»¶®µÄÈËÓÐÒ»µã½è¼øÒâÒå¡£
¶ÔÓÚÓÐЩҵÎñÀ´Ëµ£¬Êý¾ÝÔÚ±íÖеĴ洢ºÍÆä×îÖÕµÄGrid±íÏÖÇ¡ºÃÏ൱ÓÚ°ÑÔ ......