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

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
For each rowµÄÒâÒåÊÇ£ºÔÚÒ»´Î²Ù×÷±íµÄÓï¾äÖУ¬Ã¿²Ù×÷³É¹¦Ò»Ðоͻᴥ·¢Ò»´Î£»²»Ð´µÄ»°£¬±íʾÊÇ±í¼¶´¥·¢Æ÷£¬ÔòÎÞÂÛ²Ù×÷¶àÉÙÐУ¬¶¼Ö»´¥·¢Ò»´Î(ÈçÒ»´Îupdate »á¸üжàÌõÊý¾Ý,µ«ÊÇÖ»Ö´ÐÐÒ»´Î)£»
WhenÌõ¼þµÄ³öÏÖ˵Ã÷ÁË£¬ÔÚDML²Ù×÷µÄʱºòÒ²ÐíÒ»¶¨»á´¥·¢´¥·¢Æ÷£¬µ«ÊÇ´¥·¢Æ÷²»Ò»¶¨»á×öʵ¼ÊµÄ¹¤×÷£¬±ÈÈçwhen ºóµÄÌõ¼þ²»ÎªÕæµÄʱºò£¬´¥·¢Æ÷Ö»ÊǼòµ¥µØÌø¹ýÁËPL/SQL¿é£»
ÆäÖÐÖ»ÓÐupdate ¿ÉÒÔÖ¸¶¨ÁÐÃû.
instead of ÊÇÔÚÊÓͼÉ϶¨ÒåµÄ´¥·¢Æ÷,ÇÒÖ»ÄÜÔÚÐм¶´¥·¢Æ÷ÀïÃæÊ¹ÓÃ.ÒòΪÊÓͼ¶Ô±íµÄÔöɾ¸ÄÖ»ÄÜ»ùÓÚµ¥±í,ʹÓýÏÉÙ.
On ±íÃû|ÊÓͼ|ģʽÃû|Êý¾Ý¿âÃû  °´ÕÕ¶ÔÏó²»Í¬,ÓÖ¿É·ÖΪģʽ´¥·¢Æ÷(ģʽÃû),Êý¾Ý¿â´¥·¢Æ÷(database)


Ïà¹ØÎĵµ£º

oracleÁª»ú±¸·Ý

Ç°ÃæÒ»Ö±³¢ÊÔoracleµÄÁª»ú±¸·Ý¶¼Ã»Óгɹ¦£¬³öÏÖÁË0 file(s) copied£¬½ñÌìÖÕÓÚ·¢ÏÖÁËÎÊÌâËùÔÚ£¬Ìصͼ¶µÄ´íÎó¾ÍÊÇ£¬Ô­À´Host copyÓï¾äÒªÔÚÔËÐÐÃüÁî´°¿ÚÏÂÔËÐвŻáÉúЧ£¬Ç°ÃæÒ»Ö±¶¼Ì«Ï°¹ßÔÚpl/sqlÖнøÐвÙ×÷ÁË¡£
oracle9iÁª»ú±¸·ÝµÄ¹ý³Ì
sql>alter tablespce mytp begin backup;
sql>host copy f:\oracle\oradata\myt ......

ORACLE¼Æ»®(schedule)Ïê½â

´´½¨job
jobÊÇÊ²Ã´ÄØ? ¼òµ¥µÄ˵¾ÍÊǼƻ®(schedule)¼ÓÉÏÈÎÎñ˵Ã÷. ÁíÍ⻹ÓÐһЩ±ØÐëµÄ²ÎÊý.
ÕâÀïÌáµ½µÄ"ÈÎÎñ"¿ÉÒÔÊÇÊý¾Ý¿âÄÚ²¿µÄ´æ´¢¹ý³Ì,ÄäÃûµÄPL/SQL¿é,Ò²¿ÉÒÔÊDzÙ×÷ϵͳ¼¶±ðµÄ½Å±¾.
¿ÉÒÔÓÐÁ½ÖÖ·½Ê½À´¶¨Òå"¼Æ»®":
1) ʹÓÃDBMS_SCHDULER.CREATE_SCHEDULE ¶¨ÒåÒ»¸ö¼Æ»®;
2) µ÷ÓÃDBMS_SCHDULER.CREATE_JOBE¹ý³ÌÖ±½ÓÖ¸¶¨ ......

21±¾Oracle µç×ÓÊé


Oracle Database 11g A Beginner's Guide

Oracle Database 11g SQL

Oracle Database 11g SQL: Tuning Work Shop

Oracle Database 11g SQL: Tuning Work Shop Practices and Solutions

Oracle Essentials: Oracle D ......

OracleÖг£ËµµÄHA¡¢RAC¡¢DataguradµÄÇø±ð

HA
ÊÇHigh Availability
µÄÊ××Öĸ×éºÏ£¬·­Òë¹ýÀ´£¬¿ÉÒÔ½Ð×ö¸ß¿ÉÓ㬻ò¸ß¿ÉÓÃÐÔ£¬¸ß¿ÉÓ㨻·¾³£©¡£ÎÒ¾õµÃÓ¦¸Ã˵HAÊÇÒ»¸ö¹ÛÄî¶ø²»ÊÇÒ»Ïî»òһϵÁоßÌå¼¼Êõ£¬¾ÍÏóÍø¸ñÒ»Ñù¡£×÷¹ýϵͳ
·½°¸¾ÍÖªµÀÁË£¬ÆÀ¼ÛϵͳµÄÐÔÄܵ±ÖоÍÓÐÒ»Ïî¸ß¿ÉÓ᣹ãÒåµÄ¸ß¿ÉÓÃÉæ¼°µ½ÏµÍ³µÄ¸÷¸ö·½Ã棬¼òµ¥À´Ëµ£¬ÈÃϵͳ²»»áÖжÏ
ÔËÐУ¬¾ÍÊǸ߿ÉÓᣰüÀ¨È ......

oracleµÄociºÍthinÇø±ð

1£©´ÓʹÓÃÉÏÀ´Ëµ£¬oci±ØÐëÔÚ¿Í»§»úÉϰ²×°oracle¿Í»§¶Ë»ò²ÅÄÜÁ¬½Ó£¬¶øthin¾Í²»ÐèÒª£¬Òò´Ë´ÓʹÓÃÉÏÀ´½²thin»¹ÊǸü¼Ó·½±ã£¬ÕâÒ²ÊÇthin±È½Ï³£¼ûµÄÔ­Òò¡£
2£©Ô­ÀíÉÏÀ´¿´£¬thinÊÇ´¿javaʵÏÖtcp/ipµÄc/sͨѶ£»¶øoci·½Ê½,¿Í»§¶Ëͨ¹ýnative java methodµ÷ÓÃc library·ÃÎÊ·þÎñ¶Ë£¬¶øÕâ¸öc library¾ÍÊÇoci(oracle called interface ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ