学生表student班级表class课程表subject成绩表score 一、查询各班最高分学生的信息 1.从成绩表score中查询每个学生的总成绩并按降序排列select sc.stu_id,sum(sc.score) sumscore from score sc group by sc.stu_id order by sumscore desc ..._mysql查询每个班级第......
文章浏览阅读731次。//学生类class Student(namec: String, agec: Int) { val name: String = namec val age: Int = agec}//班级类class Class(classNamec:String){ var className:String=classNamec var students:Array[Student]..._下面程序定义了address school student三个类...