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

ÿÌìȡǰ10Ãû ÕâÑùµÄsqlÔõôд

¼ÙÉèÓÐÕâÑùÒ»Õűí 

create table test_db (

  id number,
  name varchar2(10),
  count number,
  logdate date

)

¼ÙÉèÓÐÕâЩ¸öÊý¾Ý:

1,a1,1,2010-02-03
2,a2,2,2010-02-03
.................
10,a10,10,2010-02-03
11,a11,11,2010-02-03
..............
30,a3,3,2010-02-04
31,a5,7,2010-02-04
............

101,a2,10,2010-02-08


ÔõôȡÿÌìǰ10ÃûµÄÊý¾ÝÈ¡³öÀ´?

..........

select id, name, count, logdate from (select test_db.*,row_number() over(partition by logdate order by logdate) rn from test_db) where rn < 11; 


·Ç³£ÃÔã¡£


ȡǰ10Ãû¡£°´ÕÕʲôÓÎÏ··½Ê½È¡£¿

ÄãµÄlogdateËäÈ»ÊÇdateÐÍ£¬µ«ÄãµÄÊý¾ÝÖ»ÓÐÄêÔÂÈÕ¡£

ͬÑùÄêÔÂÈյģ¬ÐèÒª¿¼ÂÇʱ·ÖÃë²»£¿Èç¹û²»¿¼ÂÇ£¬ÓÖ°´ÕÕʲô¹æ¸ñȡǰ10Ãû£¿ID£¿COUNT£¿£¿£¿

¼ÙÉèÈÕÆÚ¸ñʽΪ£ºYYYY-MM-DD,²Î¿¼Óï¾ä£º
select id, name, count, logdate from (select test_db.*,row_number() over(partition by logdate order by logdate) rn from test_db) where rn <= 10;

2Â¥µÄ´ð°¸¾Í¿ÉÒÔ°¡£¬ÊÔÊÔ°É£¡

SQL code:
select *
from test_db t
where 10>(select count(*) from test_db where logdate=t.logdate and count>t.count);


°´ÕÕºÎÖÖÐèÇóȡǰ10Ãû²»Ã÷È·£¡£¡£¡Â¥Ö÷ÈÃÈ˸е½ÃÔã

<


Ïà¹ØÎÊ´ð£º

sqlÓï¾ä¶à±í¶à×ֶβéѯ - MS-SQL Server / »ù´¡Àà

ÎÒÓжà¸ö±íA B C ½á¹¹ÊÇÒ»ÑùµÄ£¬¶¼ÓÐ2¸ö×Ö¶ÎnameºÍcontent,ÎÒÒªËÑË÷ËùÒÔ±íËùÓÐ×Ö¶ÎÖаüº¬¡°Öйú¡±µÄÄÚÈÝ Õâ¸öSQLÓï¾äÔõôд 

ÈçºÎ½«¶à¸ö±íµÄ²éѯ½á¹ûÁ¬³ÉÒ»¸ö±í Õâ¸öSQLÓï¾äÔõôд ±íµÄ½á¹¹ÊÇÒ»ÑùµÄ
ÀýÈç£ ......

jspÁ´½Ósql2000µÄÒÉÎÊ£¿



type Exception report


message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jas ......

¹ØÓÚSQLSERVERµ×²ãÎÊÌâ - MS-SQL Server / ÒÉÄÑÎÊÌâ

ÇëÎÊһϣ¬ÍâÍøÁ½Ì¨SQLSERVERʵÀýÊý¾Ý´«Ê䣬ÓÐûÓвÉÓÃÊý¾ÝѹËõºÍ¼ÓÃÜ¡£Ñ¹Ëõ±ÈÊǶàÉÙ£¬¼ÓÃÜÊÇʲô¼ÓÃÜËã·¨£¿Ïà¹ØÎĵµÄÄÀï¿ÉÒÔÕÒµ½£¿Ð»Ð»


ÎÒÒ²ÏëÖªµÀ£¡¹Ø×¢´ËÌù£¡

¹Ø×¢¡«¡«

Êý¾Ý¿â´óÅ£¶¼ÄÄÈ¥Á˰¡£¿
......

ÇóÒ»sqlÓï¾ä - MS-SQL Server / »ù´¡Àà

±í
id bh  
1 10
2 11
3 12 
4 15
5 16
6 22
7 25
8 26
9 27
10 28
½«bh°´Á¬Ðø·Ö¶Î³öÀ´·µ»Ø×Ö·û´®£º
10~12£¬15~16£¬22£¬25~28
SQL code:


declare @t tabl ......

ÇëÎÊASPÈçºÎÁ¬½Ó¶à¸öSQL SERVER£¿ - Web ¿ª·¢ / ASP

ÓÐÁ½¸ö»òÒÔÉϵÄÔ¶³ÌÊý¾Ý¿â£¬ÈçºÎÓÃASP¼ì²âÁ¬½ÓËٶȲ¢Á¬½Ó×î¿ìµÄMSSQLÊý¾Ý¿â£¿

ÓÐÕâÑùµÄASPº¯ÊýÂð£¿ÎÒGOOGLEÁËһϣ¬ÕÒ²»µ½¡£

PHP+MYSQLÏÂÓÐÕâÖÖÀý×Ó£º
PHP code:

Example:
$wgDBservers = array(
......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ