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- bj_0163_bj 2020-04-21 19:06关注
第一题
select * from ( select class_id,student_id,name,score_sum,rank() over (partition by class_id order by score_sum desc) rw from ( select CLASS.class_id,STUDENT.student_id,STUDENT.name,sum(score) score_sum from CLASS join CLASS_STUDENT on CLASS.class_id=CLASS_STUDENT.class_id join STUDENT on CLASS_STUDENT.student_id=STUDENT.student_id join STUDENT_SCORE on STUDENT.student_id=STUDENT_SCORE.student_id group by CLASS.class_id,STUDENT.student_id,STUDENT.name ) t ) t2 where rw=1
第二题
select * from ( select CLASS.class_id,STUDENT.student_id,STUDENT.name,STUDEN_SCORE.course,score, rank() over (partition by class_id,STUDEN_SCORE.course order by score desc) rw from CLASS join CLASS_STUDENT on CLASS.class_id=CLASS_STUDENT.class_id join STUDENT on CLASS_STUDENT.student_id=STUDENT.student_id join STUDENT_SCORE on STUDENT.student_id=STUDENT_SCORE.student_id ) t where rw=1
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