查询选修了课程号为\'C2\'的学生号和姓名,若用下列SQL的SELECT语句表达时,哪一个是错误的?______

Question

查询选修了课程号为\'C2\'的学生号和姓名，若用下列SQL的SELECT语句表达时，哪一个是错误的?______。

A．SELECT S.S#,SNAME FROM S WHERE S.S#=(SELECT SC.S# FROM SC WHERE C#=\'C2\')

B．SELECT S.S#,SNAME FROM S,SC WHERE S.S#=SC.S# AND C#=\'C2\'

C．SELECT S.S#,SNAME FROM S,SC WHERE S.S#=SC.S# AND C#=\'C2\'ORDER BYS.S#

D．SELECT S.S#,SNAME FROM S WHERE S.S# IN(SELECT SC.S# FROM SC WHERE C#=\'C2\')

Answer 1

正确答案：D