检索选修“C2”课程的学生中成绩最高的学生的学号。正确的SELECT语句是（ ）。 A: SELECT s B: FROM sc WHERE c C: =’C2’ AND grade＞＝(SELECT grade FROM sc WHERE c D: =’C2’); E: SELECT s F: FROM sc WHERE c G: =’C2’ AND grade IN(SELECT grade FROM sc WHERE c H: =’C2’); I: SELECT s J: FROM sc WHERE c K: =’C2’ AND grade NOT IN(SELECT grade FORM sc WHERE c L: =’C2’); M: SELECT s N: FROM sc WHERE c O: =’C2’ AND grade＞＝(SELECT max(grade) FROM sc WHERE c P: =’C2’);

检索选修课程“C2”的学生中成绩最高的学生的学号。正确的SELECT语句是( )。 A: SELECT S B: FORM SC WHERE C C: ='C2' AND GRAD>=<br>(SELECT GRADE FORM SC<br>WHERE C D: ='C2') E: SELECT S F: FORM SC<br>WHERE C G: ='C2' AND GRADE IN<br>(SELECT GRADE FORM SC<br>WHERE C H: ='C2') I: SELECT S J: FORM SC<br>WHERE C K: ='C2' AND GRADE NOT IN<br>(SELECT GRADE FORM SC<br>WHERE C L: ='C2') M: SELECT S N: FORM SC<br>WHERE C O: ='C2' AND GRADE>=ALL<br>(SELECT GRADE FORM SC<br>WHERE C P: ='C2')

假设有三个基本表：学生表S、课程表C、学生选课表SC，它们的结构如下：S（S#，SN，SEX，AGE，DEPT） C（C#，CN） SC（S#，C#，GRADE）检索选修课程”C2”的学生中成绩最高的学生的学号。正确的SELECT语句是（ ）。 A: SELECT S B: FROM SC WHERE C C: =”C2” AND GRADE>=(SELECT GRADE FROM SC WHERE C D: = “C2”) E: SELECT S F: FROM SC WHERE C G: =”C2” AND GRADE IN (SELECT GRADE FROM SC WHERE C H: = “C2”) I: SELECT S J: FROM SC WHERE C K: =”C2” AND GRADE NOT IN (SELECT GRADE FROM SC WHERE C L: = “C2”) M: SELECT S N: FROM SC WHERE C O: =”C2” AND GRADE>=ALL (SELECT GRADE FROM SC WHERE C P: = “C2”)

检索选修课程"C2"的学生中成绩最高的学生的学号。正确的SELECT的语句是______。 A: SELECT S# FORM SC B: WHERE C#="C2" AND GRADE> =(SELECT GRADE FORM SC) C: WHERE C#="C2") D: SELECT S#FORM SC E: WHERE C#="C2" AND GRADE IN(SELECT CRADE FORM SC) F: WHERE C#="C2" G: SELECT S# FORM SC H: WHERE C#="C2" AND GRADE NOT IN(SELECT GRADE FORM SC I: WHERE C#="C2" J: SELECT S# FORM SC K: WHERE C#="C2" AND CRANDE> =ALL(SELECT GRADE FORM SC L: WHERE C#="C2")

学生表S、课程表C和学生选课表SC，它们的结构如下： S（S#，SN，SEX，AGE，DEPT）C（C#，CN）SC（S#，C#，GRADE） 其中，S#为学号，SN为姓名，SEX为性别，AGE为年龄，DEPT为系别，C#为课程号，CN为课程名，GRADE为成绩。查询选修课程“C2”的学生中成绩最高的学生的学号。正确的SELECT语句是 A: SELECT S B: FROM SCWHERE C C: =“C2” AND GRADE >= (SELECT GRADE FROM SCWHERE C D: =“C2”) E: SELECT S F: FROM SCWHERE C G: =“C2” AND GRADE IN (SELECT MAX(GRADE) FROM SCWHERE C H: =“C2”) I: SELECT S J: FROM SCWHERE C K: =“C2” AND GRADE IN (SELECT GRADE FROM SCWHERE C L: =“C2”) M: SELECT S N: FROM SCWHERE C O: =“C2” AND GRADE > ALL (SELECT GRADE FROM SCWHERE C P: =“C2”)