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Article #1198Re: ��β����Ӳ�ѯѡ����ij�ֶ����ֵ�ļ�¼��
From: Galaxy��VOLUNTEERS
Date: Mon, 21 Jan 2008 04:31
Date: Mon, 21 Jan 2008 04:31
23 lines
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1777 bytes
��������ܲ���inner join ����left��right outer join ��֪��select����һ����ʱ���Ч����� �� �� CNMfans (CNM��˿) �Ĵ������ᵽ: �� : SELECT A,MAX(B) : FROM TAB T1 INNER JOIN TAB T2 ON T1.A=T2.A : WHERE other conditions : GROUP BY A : ����������ϰ�ѧ��ѧ�ģ����ڼDz����� : �� �� IKWYDLS (ikwydls) �Ĵ������ᵽ: �� : : ͨ�������������Բ�ѯ�ģ� : : Ҫ��ѯ�ֶ�A����ֵͬ�£�����B�� : : **** : : SELECT A, B FROM TAB T1 : .................������ʡ�ԣ� -- I thought what I'd do was, I'd pretend I was one of those deaf-mutes Or should I? You know what I��d like to be? I mean if I had my goddam choice, I��d just be the catcher in the rye and all. [m[1;31m�� ��Դ:����ˮ˼Դ bbs.sjtu.edu.cn��[FROM: 207.46.55.31][m
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arc1-ca.pugleaf.net!g2news1.google.com!news4.google.com!feeder1-2.proxad.net!proxad.net!feeder1-1.proxad.net!feeder.news-service.com!news-out1.kabelfoon.nl!newsfeed.kabelfoon.nl!bandi.nntp.kabelfoon.nl!news.shec6.edu.cn!SJTUShow Full Headers
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X-Google-Thread: 101948,e7dc1a0989ef5d50 X-Google-Attributes: gid101948,public,usenet X-Google-Language: Chinese,GB Path: arc1-ca.pugleaf.net!g2news1.google.com!news4.google.com!feeder1-2.proxad.net!proxad.net!feeder1-1.proxad.net!feeder.news-service.com!news-out1.kabelfoon.nl!newsfeed.kabelfoon.nl!bandi.nntp.kabelfoon.nl!news.shec6.edu.cn!SJTU From: Dem.bbs@bbs.sjtu.edu.cn (Galaxy��VOLUNTEERS) Newsgroups: cn.bbs.comp.database Subject: Re: ��β����Ӳ�ѯѡ����ij�ֶ����ֵ�ļ�¼�� Date: 21 Jan 2008 04:31:56 GMT Organization: ��ˮ˼Դ Message-ID: <4YAZQP$bue@bbs.sjtu.edu.cn> Mime-Version: 1.0 Content-Type: text/plain; charset="gb2312" Content-Transfer-Encoding: 8bit X-Filename: database/M.1200889849.A