Select max of one date after getting max of other date -

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i using oracle's psquery tool not have access actual code. generate list of students maximum dropped course . however, if student has more 1 dropped course on same max date, want return 1 max deadline date. so, max drop dates duplicates narrowed down further max deadline date.

select s.studentid, s.name, max(s.date), (s.deadlinedate), max(d.droppedcourse) droppedcourse   student s   join deadlinedate d on s.studentid = d.studentid   group s.studentid, s.name, s.date   having max(d.deadlinedate);

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