MySQL查詢語句練習3

沒有數據庫先執行50q數據庫web 查詢選修某課程的同窗人數多於5人的教師姓名 Select cno from score group by cno having count(*)>5; Select tname from teacher as t inner join course as c on t.tno=c.tno where cno in(Select cno from score gr

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