选择所有课程的学生名称

三张表,要查询出选择了所有课程的学生的成绩 Example: std表 std_id std_name 0001 alex 0002 bill 0003 cliton 0004 duke course表 course_id course_name 2001 english 2002 math 2003 physics score表 std_id course_id score 0001 2001 81 0002 2001 91 0001 2003 24 0003 2002 62 0001 2002 54 输出: alex english 81 alex math 54 alex physics 91 问题点数:20、回复次数:11 Top 1 楼peng1014()回复于 2005-01-11 17:34:18 得分 0 select score.std_name,course.course_name,score from std,course,score where std.std_id=score.std_id and course.course_id=score.course_id Top 2 楼libin_ftsafe(子陌红尘:当libin告别ftsafe)回复于 2005-01-11 17:45:00 得分 0 select a.std_id , a.std_name , b.course_id , c.course_name, b.score from std a, score b, course c, (select std_id,count(*) cnt from score) d, (select count(course_id) cnt from course) e where a.std_id = b.std_id and a.std_id = d.std_id and d.cnt = e.cnt and c.course_id = b.course_id Top 3 楼didoleo(冷月无声)回复于 2005-01-11 18:03:23 得分 10create table std (std_id varchar(4), std_name varchar(100)) create table course (course_id varchar(4), course_name varchar(100)) create table score (std_id varchar(4), course_id varchar(4) , chengji int) insert into std select '0001' , 'alex' union all select '0002' , 'bill' union all select '0003' , 'cliton' union all select '0004' , 'duke' insert into course select '2001' , 'english' union all select '2002' , 'math' union all select '2003' , 'physics' insert into score select '0001' , '2001' , 81 union all select '0002' , '2001' , 91 union all select '0001' , '2003' , 24 union all select '0003' , '2002' , 62 union all select '0001' , '2002' , 54 select distinct std.std_name,course.course_name,score.chengji from std right join score on std.std_id=score.std_id left join course on score.course_id=course.course_id where not exists (select 1 from course where not exists (select 1 from score where std_id=std.std_id and course_id=course.course_id)) ----------------------- alex english 81 alex math 54 alex physics 24 (所影响的行数为 3 行) Top 4 楼playyuer(退休干部 卧鼠藏虫)回复于 2005-01-11 18:18:41 得分 0 双 not exists Top 5 楼maxiaohui1212()回复于 2005-01-12 08:20:01 得分 0 老兄: 建个视图!你认为呢? Top 6 楼lxysjl(流星雨)回复于 2005-01-12 09:13:07 得分 0 我也这么认为 Top 7 楼floatyzq(float)回复于 2005-01-12 09:35:42 得分 0 didoleo(冷月无声) 的完全正确 Top 8 楼maxiaohui1212()回复于 2005-01-12 09:36:27 得分 0 SELECT TOP 100 PERCENT dbo.std.std_name, dbo.course.course_name, dbo.score.score, dbo.std.std_id FROM dbo.std RIGHT OUTER JOIN dbo.score ON dbo.std.std_id = dbo.score.std_id LEFT OUTER JOIN dbo.course ON dbo.score.course_id = dbo.course.course_id ORDER BY dbo.std.std_id Top 9 楼seayar(习习)回复于 2005-01-12 09:51:17 得分 0 up Top 10 楼SickNirvana(SickNirvana)回复于 2005-01-12 09:53:56 得分 10呵呵,这个问题跟我之前遇到的一模一样 前面写得太复杂了 最经典的做法还是双not exists 具体看这里: http://community.csdn.net/Expert/topic/3696/3696046.xml?temp=.1676905 Top 11 楼winternet(冬天)回复于 2005-01-12 10:48:48 得分 0 select std_name,course_name,score from std as a inner join score as b on a.std_id=b.std_id inner join course as c on b.course_id=c.course_id where a.std_id in (select std_id from score group by Std_ID having count(distinct course_id)=(select count(*) from course)) 测试结果: std_name course_name score ---------- ---------- ---------- alex english 81 alex math 54 alex physics 24 (3 row(s) affected)

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