Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

SQLÁª±í¸üУ¬Áª±í²éѯ

ûÓÐÒýÓùØÏµµÄ±í
 £±.¡¡Áª±í¸üÐÂ
update  a set a.education = '±¾¿Æ' from NT_UserInfo a ,NT_User b where  a.UserID=b.UserID and b.email = 'carlfan2008@163.com'
£².¡¡Áª±í²éѯ
select a.*,b.* from nt_user as a, nt_userinfo as b where a.userid = b.userid and Email = 'carlfan2008@163.com'


Ïà¹ØÎĵµ£º

SQLÖÐonÌõ¼þÓëwhereÌõ¼þµÄÇø±ð (having)

 
 
SQLÖÐonÌõ¼þÓëwhereÌõ¼þµÄÇø±ð
      Êý¾Ý¿âÔÚͨ¹ýÁ¬½ÓÁ½ÕÅ»ò¶àÕűíÀ´·µ»Ø¼Ç¼ʱ£¬¶¼»áÉú³ÉÒ»ÕÅÖмäµÄÁÙʱ±í£¬È»ºóÔÙ½«ÕâÕÅÁÙʱ±í·µ»Ø¸øÓû§¡£
     ÔÚʹÓÃleft jionʱ£¬onºÍwhereÌõ¼þµÄÇø±ðÈçÏ£º
1¡¢ onÌõ¼þÊÇÔÚÉú³ÉÁÙʱ±íʱʹÓõÄÌõ¼ ......

SQL²éѯÓï¾ä´óÈ« T

 --Óï ¾ä                                ¹¦ ÄÜ
1¡¢Êý¾Ý²Ù×÷
Select      --´ÓÊý¾Ý¿â±íÖмìË÷Êý¾ÝÐкÍÁÐ
Insert & ......

Oracle SQLÓï¾ä²Ù×÷Êý×Ö£ºÈ¡Õû¡¢ËÄÉáÎåÈë¼°¸ñʽ»¯

 http://cheneyph.javaeye.com/blog/453492
ÓÃoracle sql¶ÔÊý×Ö½øÐвÙ×÷: È¡ÉÏÈ¡Õû¡¢ÏòÏÂÈ¡Õû¡¢±£ÁôNλСÊý¡¢ËÄÉáÎåÈë¡¢Êý×Ö¸ñʽ»¯
È¡Õû£¨ÏòÏÂÈ¡Õû£©£º 
select floor(5.534) from dual;
select trunc(5.534) from dual;
ÉÏÃæÁ½ÖÖÓ÷¨¶¼¿ÉÒÔ¶ÔÊý×Ö5.534ÏòÏÂÈ¡Õû£¬½á¹ûΪ5.
Èç¹ûÒªÏòÉÏÈ¡Õû £¬µÃµ½½á¹ûÎ ......

sql ½»²æ±í

½»²æ±íÓï¾äµÄʵÏÖ:
¡¡¡¡ÓÃÓÚ:½»²æ±íµÄÁÐÊýÊÇÈ·¶¨µÄ
¡¡¡¡select name,sum(case subject when 'Êýѧ' then source else 0 end) as 'Êýѧ',
¡¡¡¡sum(case subject when 'Ó¢Óï' then source else 0 end) as 'Ó¢Óï',
¡¡¡¡sum(case subject when 'ÓïÎÄ' then source else 0 end) as 'ÓïÎÄ'
¡¡¡¡from test
¡¡¡¡group by name ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ