已知S(Sno,SN,AGE,SEX),Sno学号，SN姓名。若要检索所有比'王华'年龄大的学生姓名、年龄和性别，正确的SELECT语句是_________。
A. SELECT SN,AGE,SEX FROM S WHERE AGE > 王华.AGE
B. SELECT SN,AGE,SEX FROM S WHERE SN='王华'
C. SELECT SN,AGE,SEX FROM S WHERE AGE>(SELECT AGE WHERE SN='王华')
D. SELECT SN, AGE, SEX FROM S WHERE AGE>(SELECT AGE FROM S WHERE SN='王华')
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下面有关HAVING子句，说法不正确的是_________。
A. 使用HAVING子句的作用是过滤掉不满足条件的分组
B. 使用HAVING子句的同时不能使用WHERE子句
C. 使用HAVING子句的同时可以使用WHERE子句
D. HAVING子句必须与GROUP BY 子句同时使用，不能单独使用
在SQL中，与"NOT IN"等价的操作符是_________。
A. <> ALL
B. = any
C. <> any
D. = ALL
以下定义的4个视图中，能够进行更新操作的是_________。
A. CREATE VIEW S_G(学号,姓名,课程名,分数) AS SELECT S.学号,姓名,课程名,分数 FROM student S,score SC,course C WHERE S.学号=S学号AND S课程号 = 课程号;
B. CREATE VIEW S_AVG(学号,平均分) AS SELECT 学号,AVG(分数) FROM scoreWHERE 分数IS NOT NULL GROUP BY 学号;
CREATE VIEW S_MALE(学号,姓名) AS SELECT 学号,姓名 FROM student WHERE 班号='09031';
D. CREATE VIEW S_FEMALE(姓名,出生日期) AS SELECT 姓名,出生日期 FROM student WHERE 性别='女';
已知选课关系SC(Sno char(8), Cno char(8), GRADE integer)，Sno学号，Cno课程号，GRADE成绩。检索选修4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 Sno,SUM(GRADE) as Sgrade FROM SC WHERE GRADE>=60 and COUNT(*)>=4 GROUP BY Sno ORDER BY Sgrade DESC;
B. SELECT Sno,SUM(GRADE) as Sgrade FROM SC WHERE GRADE>=60 GROUP BY Sno HAVING COUNT(*)>=4 ORDER BY Sgrade;
C. SELECT Sno,SUM(GRADE) as Sgrade FROM SC WHERE GRADE>=60 HAVING COUNT(*)>=4 GROUP BY Sno ORDER BY Sgrade DESC;
D. SELECT Sno,SUM(GRADE) as Sgrade FROM SC WHERE GRADE>=60 GROUP BY SnoHAVING COUNT(*)>=4 ORDER BY Sgrade DESC;
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