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

ORACLE ·Ö×é ÅÅÐò³öÇ°Ãæ×î´óµÄNÐÐ

select  custid,carid,Cunote,INVNO,BUYPLAN  
from ( select custid,carid,Cunote,INVNO,BUYPLAN,
row_number() over(partition by custid,carid order by Feedbackid desc) rn
  from pvE3S.T_VCTM_CUSTOMER_FEEDBACK) t1 where rn=1
°´Feedbackid ÅÅÐò,rnÊÇǰNÐÐ


Ïà¹ØÎĵµ£º

oracle ´¥·¢Æ÷

Create [or replace] trigger [ģʽ.]´¥·¢Æ÷Ãû
       Before| after |instead of  insert|delete|(update of ÁÐÃû)
       {insert|delete|(update of ÁÐÃû) }
On ±íÃû|ÊÓͼ|ģʽÃû|Êý¾Ý¿âÃû
[for each row]
When Ìõ¼þ
PL/SQL¿é
˵Ã÷£º
......

OracleÌåϵ½á¹¹Ö®£­Êý¾Ý¿â¡¢±í¿Õ¼ä¡¢ÊµÀý¼ò½é

Ò»¡¢Êý¾Ý¿â
Êý¾Ý¿â¹ËÃû˼ÒåÊÇÊý¾ÝµÄ¼¯ºÏ£¬¶øOracleÔòÊǹÜÀíÕâЩÊý¾Ý¼¯ºÏµÄÈí¼þϵͳ£¬ËüÊÇÒ»¸ö¶ÔÏó¹ØÏµÐ͵ÄÊý¾Ý¿â¹ÜÀíϵͳ¡£    
¶þ¡¢±í¿Õ¼ä
±í¿Õ¼äÊÇOracle¶ÔÎïÀíÊý¾Ý¿âÉÏÏà¹ØÊý¾ÝµÄÂß¼­Ó³Éä¡£Ò»¸öÊý¾Ý¿âÔÚÂß¼­Éϱ»»®·Ö³ÉÒ»µ½Èô¸É¸ö±í¿Õ¼ä£¬Ã¿¸ö±í¿Õ¼ä°üº¬ÁËÔÚÂß¼­ÉÏÏà¹ØÁªµÄÒ»×é½á¹¹¡£Ã¿¸öÊý¾Ý¿âÖ ......

OracleÊý¾Ýµ¼Èëµ¼³öimp/exp

¹¦ÄÜ£ºOracleÊý¾Ýµ¼Èëµ¼³öimp/exp¾ÍÏ൱ÓëoracleÊý¾Ý»¹Ô­Ó뱸·Ý¡£´ó¶àÇé¿ö¶¼¿ÉÒÔÓÃOracleÊý¾Ýµ¼Èëµ¼³öÍê³ÉÊý¾ÝµÄ±¸·ÝºÍ»¹Ô­£¨²»»áÔì³ÉÊý¾ÝµÄ¶ªÊ§£©¡£
¡¡¡¡OracleÓиöºÃ´¦£¬ËäÈ»ÄãµÄµçÄÔ²»ÊÇ·þÎñÆ÷£¬µ«ÊÇÄã×°ÁËoracle¿Í»§¶Ë£¬²¢½¨Á¢ÁËÁ¬½Ó £¨Í¨¹ýnet8 assistantÖб¾µØ——>·þÎñÃüÃû Ìí¼ÓÕýÈ·µÄ·þÎñÃüÃû
¡¡¡¡Æ ......

Oracle SQLµÄÓÅ»¯


SQLµÄÓÅ»¯Ó¦¸Ã´Ó
5
¸ö·½Ãæ½øÐе÷Õû£º
1.È¥µô²»±ØÒªµÄ´óÐͱíµÄÈ«±íɨÃè
2.»º´æÐ¡ÐͱíµÄÈ«±íɨÃè
3.¼ìÑéÓÅ»¯Ë÷ÒýµÄʹÓÃ
4.¼ìÑéÓÅ»¯µÄÁ¬½Ó¼¼Êõ
5.¾¡¿ÉÄܼõÉÙÖ´Ðмƻ®µÄ
Cost
SQLÓï¾ä£º
ÊǶÔÊý¾Ý¿â(
Êý¾Ý
)
½øÐвÙ×÷µÄΩһ;¾¶£»
ÏûºÄÁË70%~90%
µÄÊý¾Ý¿â×ÊÔ´£»¶ÀÁ¢ÓÚ³ÌÐòÉè¼ÆÂß¼­£¬Ïà¶ÔÓÚ¶Ô³ÌÐòÔ´´úÂëµÄÓÅ»¯£¬ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ