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Article #853Re: �ʸ�sql �������
From: Galaxy��VOLUNTEERS
Date: Sun, 28 Sep 2008 15:46
Date: Sun, 28 Sep 2008 15:46
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1799 bytes
��UNIONһ��A�� �� �� Suppes (����շ�) �Ĵ������ᵽ: �� : ���A��B��C���ű���ѡ��� : ����A������ : ����B��C�ֱ����ֶ�studyid��subjectid���Ը�A���� : ��������ʱ��B��C�?һ���м�¼��A��ƥ������ : Ҳ����B.studyid=A.studyid��C.subjectid=A.subjectid��һ������ : ��������ͨ��A��ͬʱouter left join B��C�� : ��Ҫ�Ľ����A����ֶ�ÿ�ζ�Ҫ�� : B��C����ֶ�ֻ����ϵ������ʱ��ȡ�õ�������Ϊ�� : ��������ǵ���ϵ��������ʱ�����б���ֶζ�Ϊ�� : �����sql���Ҫ��ôд�� -- 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;34m�� ��Դ:����ˮ˼Դ bbs.sjtu.edu.cn��[FROM: 58.35.155.80][m
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X-Google-Thread: 101948,98291be71d3ed5c8 X-Google-Attributes: gid101948,domainid0,public,usenet X-Google-Language: Chinese,GB Path: arc1-ca.pugleaf.net!g2news1.google.com!news2.google.com!news.glorb.com!news.neu.edu.cn!news.shec6.edu.cn!SJTU From: Dem.bbs@bbs.sjtu.edu.cn (Galaxy��VOLUNTEERS) Newsgroups: cn.bbs.comp.database Subject: Re: �ʸ�sql ������� Date: 28 Sep 2008 15:46:04 GMT Organization: ��ˮ˼Դ Message-ID: <4cF9U4$amc@bbs.sjtu.edu.cn> Mime-Version: 1.0 Content-Type: text/plain; charset="gb2312" Content-Transfer-Encoding: 8bit X-Filename: database/M.1222616740.A