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【单选题】

检索选修四门以上课程的学生总成绩 ( 不统计不及格的课程 ) ,并要求按总成绩的降序排列出来。正确的 SELECT 语句是 。

A.
SELECT S#,SUM(GRADE)FROM SC WHERE GRADE>=60 GROUP BY S#  HAVING COUNT(C #)>=4 ORDER BY 2 DESC
B.
SELECT S# FORM SC WHERE C#=“C2” AND GRADE IN (SELECT GRADE FROM SC W
C.
SELECT S# FORM SC WHERE C#=“C2” AND GRADE NOT IN (SELECT GRADE FROM SC
D.
SELECT S# FORM SC WHERE C#=“C2” AND GRADE>=ALL (SELECT GRADE FROM SC )
题目标签:四门语句排列
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举一反三

【单选题】四门安装时,安装顺序是()

A.
后门先装
B.
前门先装,左侧门先装
C.
右侧门先装