Re: ��д��sql��ѯ��

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#8664

From: parameter
Date: Wed, 05 Nov 2003 01:58

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select s1.����,s2.����
from student as s1,student as s2,grade as g1,grade as g2
where s1.ѧ��=g1.ѧ�� and s2.ѧ��=g2.ѧ�� and g1.�ɼ�=g2.�ɼ� and g1.�γ̺�=g
2.�γ̺� and g1.ѧ��<>g2.ѧ�ţ�


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select distinct student.ѧ��,�γ��� as �޳ɼ��γ�
from student,course,grade
where student.ѧ��=course.ѧ�� and course.�γ̺�=grade.�γ̺� and grade.�ɼ�=
null;


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select distinct s1.����,s1.ѧ��,s2.ѧ��
from student as s1,student as s2
where s1.����=s2.���� and s1.ѧ��<>s2.ѧ��;


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From: rego.bbs@bbs.sjtu.edu.cn (parameter)
Newsgroups: cn.bbs.comp.database
Subject: Re: ��д��sql��ѯ��
Date: 05 Nov 2003 01:58:27 GMT
Organization: ��ˮ˼Դ
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