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

Çë½Ìoracle²éѯÎÊÌâ - Oracle / »ù´¡ºÍ¹ÜÀí

Çë½ÌÈçºÎ´ÓÒ»ÕűíÀï¼´È¡ËûµÄijһ×ֶεĺϼÆÖµ£¬Í¬Ê±ÓÖÈ¡ÕâÕűíÒÔÈÕÆÚÅÅÐòµÄijһ×ֶεÄ×î´óÖµ¡£Í¨¹ýÓï¾äÈçºÎʵÏÖ£¬ÇëÖ¸µã
ͬʱÓÖÈ¡ÕâÕűíÒÔÈÕÆÚÅÅÐòµÄijһ×ֶεÄ×î´óÖµ
²»¶®這¾äµÄÒâ˼£¬½â釋һϰɣ¿

max(ijһ×Ö¶Î)keep(dense_rank last order by ÈÕÆÚ×Ö¶Î)

select sum(a) ,max(b) from table;



¶ÔÓÚÒ»¸ö×ֶεÄÖµÀ´Ëµ£¬²»¹ÜËû°´Ê²Ã´ÅÅÐò£¬ÓÐûÓÐÅÅÐò£¬ÄǸö×î´óֵʼÖÕÊÇ×î´óÖµ°¡£¿£¡

ÒýÓÃ
max(ijһ×Ö¶Î)keep(dense_rank last order by ÈÕÆÚ×Ö¶Î)

ÓÖ學習ÁË£¡

SQL code:

--×麯Êý
select riqi,max(col3) keep(dense_rank last order by col3) ×î´óÖµ,
min(col3) keep(dense_rank first order by col3) ×îСֵ,
×Ö¶Î×ÜÖµ=(select sum(col2) from tb)
from tb
group riqi




·Ç³£¸Ðл¡££¨wildwave¡¢wkc168£©


Ïà¹ØÎÊ´ð£º

Oracle Êý¾Ýµ¼³öÎÊÌâ - Oracle / ¸ß¼¶¼¼Êõ

exp user/password@dbname file=c:\table.dmp tables=jbitaku,jbitakum grants=y
È»áá°´»Ø車鍵 說Ã÷:¡¡ user/password@dbname ¡¡·Ö別±íʾÓÃ戶Ãû£¬ÃÜ碼ºÍ·þ務Ãû f ......

javaÔõôÁ¬½ÓOracle£¬¼±°¡ - Java / JavaÏà¹Ø

private static final String URL = "jdbc:oracle:thin:@localhost:1521:orcl";
private static final String USERNAME = "sys";
private static final String PASSWORD = "s ......

oracleÓëaix - Oracle / ¸ß¼¶¼¼Êõ

ÔÚϵͳÔËÐеÄʱºò×ÜÊÇÓÐÒ»¿é´ÅÅÌʼÖÕÉÁºìµÆ£¬½øÈëϵͳºó
#topas²é¿´×ÜÊÇÓÐÒ»¿é´ÅÅÌ%BUSYΪ90%ÒÔÉÏ£¬
Êý¾Ý¿â°æ±¾£ºoracle 9.2.0.7 
Êý¾ÝÎļþ¹ÒÔØµÄ½Úµã£º/oradata/pcs/ Âß¼­¾íºÅlv04 
#lslv -l lv04 ......

oracle 9i ×î½ü·¢Ïֵǽ±¨´í - Oracle / »ù´¡ºÍ¹ÜÀí

ÓÃPL/SQL µÇ½ʱµ¯³ö±¨´í´°¿Ú£¬´íÎóÈçÏ£¡
  ORA-01034:ORACLE not available
  ORA-27101:shared memory realm does not exist
ÇëÎÊ£¬ÓÐûÓÐÈËÓöµ½ÕâÖÖÇé¿ö£¬Ôõô½â¾ö£¿Ð»Ð»£¡

1. Oracle sid ÕýÈ ......

OracleÁÙʱ±íʹÓÃÎÊÌâ - Oracle / ¿ª·¢

ÎҵĴ¦ÀíÊÇÕâÑùµÄ£º
ÎÒÓÐÒ»¸öºÜ´óµÄÊý¾Ý¼¯ºÏ£¬´¦ÓÚÐÔÄÜ·½ÃæµÄ¿¼ÂÇÐèҪʹÓÃÁÙʱ±í¹ý¶É£¬²¢ÇÒʹÓ÷ÖÒ³µÄ·½Ê½ÏòÁÙʱ±íÖвåÈëÊý¾Ý£¬Êý¾ÝʹÓÃÍê±Ïºó£¬É¾³ýÁÙʱ±íµÄÊý¾Ý¡£
³öÏÖµÄÏÖÏ󣺵±OracleÖØÐÂÆô¶¯ºó£¬µÚÒ»Ò³²åÈëµÄ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ