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

ORACLE GROUPING_IDº¯Êý

¿ÉÒÔʹÓÃGROUPING_IDº¯Êý½èÖúHAVING×Ó¾ä¶Ô¼Ç¼½øÐйýÂË£¬½«²»°üº¬Ð¡¼Æ»òÕß×ܼƵļǼ³ýÈ¥¡£GROUPING_ID()º¯Êý¿ÉÒÔ½ÓÊÜÒ»Áлò¶àÁУ¬·µ»ØGROUPINGλÏòÁ¿µÄÊ®½øÖÆÖµ¡£GROUPINGλÏòÁ¿µÄ¼ÆËã·½·¨Êǽ«°´ÕÕ˳Ðò¶ÔÿһÁе÷ÓÃGROUPINGº¯ÊýµÄ½á¹û×éºÏÆðÀ´¡£
¹ØÓÚGROUPINGº¯ÊýµÄʹÓ÷½·¨¿ÉÒԲμûÎÒÇ°ÃæÐ´µÄһƪÎÄÕÂ
http://blog.csdn.net/wh62592855/archive/2009/11/16/4818072.aspx
1¡¢GROUPING_IDÓ÷¨ÊµÀý
SQL> select
  2  division_id,job_id,
  3  grouping(division_id) as div_grp,
  4  grouping(job_id) as job_grp,
  5  grouping_id(division_id,job_id) as grp_id,
  6  sum(salary)
  7  from employees2
  8  group by cube(division_id,job_id)
  9  order by division_id,job_id;
DIV JOB    DIV_GRP    JOB_GRP     GRP_ID SUM(SALARY)
--- --- ---------- ---------- ---------- -----------
BUS MGR          0          0          0      530000
BUS PRE          0          0          0      800000
BUS WOR          0          0          0      280000
BUS              0          1          1     1610000
OPE ENG          0          0          0      245000
OPE MGR  &nbs


Ïà¹ØÎĵµ£º

Ò»¸öÐÞ¸ÄOracleÓû§ÃÜÂëµÄС¾÷ÇÏ

 Êý¾Ý¿â°æ±¾£º9.2.0.5
¡¡¡¡ÓÐʱºòÎÒÃÇ¿ÉÄܲ»ÖªµÀÒ»¸öÓû§µÄÃÜÂ룬µ«ÊÇÓÖÐèÒªÒÔÕâ¸öÓû§×öһЩ²Ù×÷£¬ÓÖ²»ÄÜÈ¥Ð޸ĵôÕâ¸öÓû§µÄÃÜÂ룬Õâ¸öʱºò£¬¾Í¿ÉÒÔÀûÓÃһЩСÇÏÃÅ£¬À´Íê³É²Ù×÷¡£
¡¡¡¡¾ßÌå²Ù×÷¹ý³ÌÈçÏ£º
¡¡¡¡SQL*Plus: Release 9.2.0.5.0 - Production on ÐÇÆÚÈÕ 11ÔÂ 21 13:32:34 2004
¡¡¡¡Copyright (c) 1982, ......

Oracle Êý¾Ý×ÖµädzÎö

Êý¾Ý×ÖµäÊÇOracle´æ·ÅÓйØÊý¾Ý¿âÐÅÏ¢µÄµØ·½£¬ÆäÓÃ;ÊÇÓÃÀ´ÃèÊöÊý¾ÝµÄ¡£±ÈÈçÒ»¸ö±íµÄ´´½¨ÕßÐÅÏ¢£¬´´½¨Ê±¼äÐÅÏ¢£¬ËùÊô±í¿Õ¼äÐÅÏ¢£¬Óû§·ÃÎÊȨÏÞÐÅÏ¢µÈ¡£µ±Óû§ÔÚ¶ÔÊý¾Ý¿âÖеÄÊý¾Ý½øÐвÙ×÷ʱÓöµ½À§ÄѾͿÉÒÔ·ÃÎÊÊý¾Ý×ÖµäÀ´²é¿´ÏêϸµÄÐÅÏ¢¡£
OracleÖеÄÊý¾Ý×ÖµäÓо²Ì¬ºÍ¶¯Ì¬Ö®·Ö¡£¾²Ì¬Êý¾Ý×ÖµäÖ÷ÒªÊÇÔÚÓû§·ÃÎÊÊý¾Ý×Öµäʱ²»»á·¢ ......

Oracle Óï¾äÓÅ»¯30¸ö¹æÔò(ÉÏ)

1. Ñ¡ÓÃÊʺϵÄOracleÓÅ»¯Æ÷
¡¡¡¡OracleµÄÓÅ»¯Æ÷¹²ÓÐ3ÖÖ£º
¡¡¡¡a. RULE (»ùÓÚ¹æÔò)
¡¡¡¡b. COST (»ùÓڳɱ¾)
¡¡¡¡c. CHOOSE (Ñ¡ÔñÐÔ)
¡¡¡¡ÉèÖÃȱʡµÄÓÅ»¯Æ÷£¬¿ÉÒÔͨ¹ý¶Ôinit.oraÎļþÖÐOPTIMIZER_MODE²ÎÊýµÄ¸÷ÖÖÉùÃ÷£¬ÈçRULE£¬COST£¬CHOOSE£¬ALL_ROWS£¬FIRST_ROWS . Ä㵱ȻҲÔÚSQL¾ä¼¶»òÊǻỰ(session)¼¶¶ÔÆä½øÐи²¸Ç¡£ ......

OracleÖÐDecode()º¯ÊýʹÓü¼ÇÉ


¡¡¡¡decode()º¯ÊýÊÇORACLE PL/SQLÊǹ¦ÄÜÇ¿´óµÄº¯ÊýÖ®Ò»£¬Ä¿Ç°»¹Ö»ÓÐORACLE¹«Ë¾µÄSQLÌṩÁ˴˺¯Êý£¬ÆäËûÊý¾Ý¿â³§É̵ÄSQLʵÏÖ»¹Ã»Óд˹¦ÄÜ¡£
      DECODEº¯ÊýÊÇORACLE PL/SQLÊǹ¦ÄÜÇ¿´óµÄº¯ÊýÖ®Ò»£¬Ä¿Ç°»¹Ö»ÓÐORACLE¹«Ë¾µÄSQLÌṩÁ˴˺¯Êý£¬ÆäËûÊý¾Ý¿â³§É̵ÄSQLʵÏÖ»¹Ã»Óд˹¦ÄÜ¡£DECODEÓÐÊ²Ã´Ó ......

oracle ±Ê¼Ç IX Ö®ÄÚÁª¡¢×óÁª¡¢ÓÒÁª

½éÉÜÒ»ÏÂÄÚÁª¡¢×óÁª¡¢ÓÒÁª
Ò».ÏÈ¿´Ò»Ð©×î¼òµ¥µÄÀý×Ó
Àý×Ó
Table A
aid adate
1 a1
2 a2
3 a3
TableB
bid bdate
1 b1
2 b2
4 b4
Á½¸ö±ía,bÏàÁ¬½Ó,Ҫȡ³öidÏàͬµÄ×Ö¶Î
select * from a inner join b on a.aid = b.bidÕâÊǽöÈ¡³öÆ¥ÅäµÄÊý¾Ý.
´ËʱµÄÈ¡³öµÄÊÇ:
1 a1 b1
2 a2 b2
ÄÇôleft join Ö¸:
select * ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ