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

ÇóÒ»sqlÓï¾ä

Óû§±í£ºuser
id  name  sex
1  ÕÅÈý  Å®
2  ÀîËÄ  ÄÐ
3  Íõ¶þ  ÄÐ

ÎÄÕÂ±í£ºarticle
id fid  title
1  1    ÕÅÈýµÄÎÄÕÂ
2  1    ÕÅÈýµÄÎÄÕÂ
3  2    ÀîËĵÄÎÄÕÂ
4  3    Íõ¶þµÄÎÄÕÂ

ÏëÓÃÒ»ÌõsqlÓï¾äµÃµ½ÏÂÃæµÄÁÐ±í£º

Óû§Ãû(name)  ÎÄÕÂÊý()  ÐÔ±ð(sex)
  ÕÅÈý            2        Å®
  ÀîËÄ            1        ÄÐ
  Íõ¶þ            1        ÄÐ
Äã·¢µ½ÁíÍâÒ»¸ö°æµÄÒѾ­ÓÐÈ˸øÄã»Ø´ðÁË
http://topic.csdn.net/u/20100216/10/9d4b7ebf-c685-43c2-9ed7-500302295295.html

SELECT users.name,COUNT(article.fid),users.sex from users AS users , article AS article WHERE users.id = article.fid GROUP BY article.fid;

SQL code:
select name,sex,count(article.id)
from user left join article on user.id=article.fid
group by name,sex



Ïà¹ØÎÊ´ð£º

sqlÐÔÄÜÇóÖú - MS-SQL Server / ÒÉÄÑÎÊÌâ

³¡¾°ÈçÏ£º
¿Í»§°Ñ±¸·ÝºÃµÄÊý¾Ý¿â£¬·¢¸øÎÒ£¬ÎÒÔÚ±¾»ú»¹Ô­ºó£¬ÔËÐÐдºÃµÄ´æ´¢¹ý³Ì£¬±È½Ï¿ì£¬²¢ÇÒÔÚʵʩÄDZßÔËÐÐͬÑù±È½Ï¿ì¡£µ«Êǵ±ÊµÊ©ÔÚ¿Í»§ÄDZßÔËÐеÄʱºòËٶȾͷdz£µÄÂý£¬Ê±¼ä³¬³öÁ˳ÌÐòµÄʱ¼äÏÞÖÆ¡£Ô¶³ÌÔÚ¿Í»§ÄÇ ......

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 ......

sqlÓÅ»¯ - Oracle / »ù´¡ºÍ¹ÜÀí

select count(1) from FX_RETURNBOOKCHECKLIST fxreturnbo0_ where fxreturnbo0_.BOOKID='164 ' AND fxreturnbo0_.RETURNID='00025.S0000001' 
ÉÏÃæÒ»¸ö¼òµ¥µÄSQL,Ö´ÐÐʱ¼ä2.6à ......

sqlserver´íÎó - MS-SQL Server / ÒÉÄÑÎÊÌâ

sqlserver2005 ½¨Á¢µÄÊý¾Ý¿â£¬ÓëÊÖ³Öpda´«ÊäÊý¾Ý£¬×î½üͻȻ³öÏÖÎÞ·¨´«µÝÊý¾ÝµÄÎÊÌ⣬pda¶ËÌáʾµÄ´íÎóʱoutofmemoryexception£¬µ«ÊÇpdaÉÏÃæµÄÈÝÁ¿Ã»ÓÐÎÊÌ⣬
sqlserverµÄÈÕ×ÓÉϵĴíÎóÈçÏ£º
ÈÕÆÚ 2010-1-25 14:45: ......

MS SQL×÷ÒµÎÊÌâ - MS-SQL Server / Ó¦ÓÃʵÀý

ÈçºÎÔÚSQL2005ÖÐÉ趨¶¨Ê±×÷Òµ£¬±ÈÈç˵¶¨Ê±ÇåÀíijЩ±íµÄÊý¾Ý£¬
»òÕßÊǶ¨Ê±µÄ½«Ä³Ð©±íµÄÊý¾Ýµ¼³öexcel£¡
ÔÚÏߵȴý£¬¼±¼±¼±£¬×îºÃÊÇÏêϸ²½Ö裡
֮ǰÎÒ×öµÄ×÷ÒµÓеãÎÊÌ⣡
°ïUP

²Î¿¼:http://hi.baidu.com/toiota ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ