Çë½Ì¸öSQL²éѯÎÊÌâ - Oracle / ¿ª·¢
ÎÒÏÖÔÚÓÐÒ»Õűí ÀïÃæÓÐÁ½Ìõ¼Ç¼
name time
ÕÅ 3
Íõ 2
ÏÖÔÚÎÒÏëÒªµÃµ½µÄ½á¹ûÊÇtimeÊǼ¸¾Í»á²éѯ³ö¼¸Ìõ
name time
ÕÅ 1
ÕÅ 1
ÕÅ 1
Íõ 1
Íõ 1
Ôõô×ö
-- ÕâÑùÕû£ºÓÐÒâÒåÂð£¿
µ±È»ÓÐÒâÒåÁË£¬ÎÒÄõıíÖ»²»¹ýÊǾٸöÀý×Ó£¬Êµ¼ÊÓô¦µ±È»ÓÐÁË¡£ÎÒÔÚÕâÀïÖ»²»¹ýÊǰÑÀý×ÓÃèÊöµÄ¼ò»¯ÁË¡£
ºóÃæµÄtime×ֶνá¹ûÊǼ¸¶¼²»Ëùν£¬²»ÊÇ1Ò²ÐУ¬
ÕÅ 3
Íõ 2
ÏÖÔÚÎÒÏëÒªµÃµ½µÄ½á¹ûÊÇtimeÊǼ¸¾Í»á²éѯ³ö¼¸Ìõ
name time
ÕÅ 3
ÕÅ 3
ÕÅ 3
Íõ 2
Íõ 2
ÕâÑù¿ÉÄÜ»á¼òµ¥µã£¬Çë½Ì¸ßÊÖÀ´°ï°ïæ°¡
4Â¥£¬5Â¥µÄ·¢·¨¶¼¿ÉÒÔ£¬µ«ÊÇÎÒÕâ²éѯ½á¹ûÓÐ5000Ìõ×óÓÒ£¬Ö´ÐÐÁË20·ÖÖÓ»¹Ã»²é³öÀ´¡£¡£
¸Õ¸ÕÄǸöSQLµÄЧÂʵÄÈ·²»ºÃ£¬ÊÔÏÂÕâ¸ö
SQL code:
select a.name, a.time
from tb a,
(SELECT level l
from (select max(time) maxtime from tb)
CONNECT BY level <= maxtime) b
where a.time >= b.l
order by a.name
Ïà¹ØÎÊ´ð£º
ÎÒÊÇÓÃÔ¶³Ì×ÀÃæÁ¬²Ù×÷·þÎñÆ÷ÉϵÄÊý¾Ý¿â¡£
ÔÚ´´½¨Ò»¸öÓû§Ö®ºó£¬ÔÙÓÃPLSQLµÇ¼£¬ÔòPLSQLËÀµôÁË¡£
ÎҹصôPLSQLÖ®ºó£¬ÓÃÆäËûÓû§Ò²²»ÄܵǼ¡£
ÎÒ°ÑoracleµÄ·þÎñÍ£Ö¹£¬½á¹û¾ÍÊÇoracleµÄ·þÎñ״̬¾ÍÍ£ÁôÔÚ¡°Í ......
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 ......
Ð»Ð»ÌÆÈËÀÏ´óµÄÖ¸µã£¬Ð»Ð»¸÷λ¸ßÊÖµÄÖ¸µã£¡
°²×°10g Enterprise¡£ÉÏÍøÏÂÁËMLDNµÄOracleÊÓÆµ£¬¸ú×ÅÊÓÆµÉϵÄÅäÖÃ×ߣ¬°²×°³É¹¦ÁË£¬µ«ÊÇûÍêÕûµØÅäÖá£
µã»÷½øÈ룺Database Configuration Assistant
1. ´´½¨Êý¾Ý¿â£»
......
SQL code:
CREATE OR REPLACE PROCEDURE usp_refreshTopN IS
BEGIN
--Îĵµ
INSERT INTO topnresource(resourceId,title,type,cover,brief,properUser,tag,clickAmount,createDate,topNCreateDate,organizat ......
A±í ÓÐÁ½¸ö×Ö¶Î
id ΨһÊý×ÖÓò
InfoTxt text ÀàÐÍ
ÎÒÏÖÔÚÒª°Ñ id ²»ÊÇ14 µÄËùÓÐ InfoTxt×Ö¶Î Îı¾ºóÃæ ¶¼¼ÓÉÏ 'aaa'
°´ÏÂÃæÖ´ÐÐÏÂÀ´ Ö»Óбí×îºóÒ»ÐмÓÉÏÁË 'aaa' ......