【简答题】A.Select C#,AVG(Score)From学生成绩表 Group by score Order by 2,C# Desc B.Select C#,AVG(Score)From学生成绩表 Group by C# Order by 2,C# Desc C.Select C#,AVG(Score)From学生成绩表 Vyhere C# Desc Group by Score D.Select ...
【简答题】A.SELECT Cno, AVG(Score) FROM SCS GROUP BY Score ORDER BY 2 ,Cno DESC B.SELECT Cno, AVG(Score)FROM SCS GROUP BY Cno ORDER BY 2 ,Cno DESC C.SELECT Cno, AVG(Score) FROM SCS WHERE Cno, DESC GROUP BY Scor...