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，是
题型：单项选择题
问题：
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，是错误的。
A．SELECT S#,SNAME FROM S WHERE S# =(SELECT SS# FROM SC WHERE C#='C2')
B．SELECT S#,SNAME FROM SC WHERE S#=SS# AND C#='C2'
C．SELECT S#,SNAME FROM SC WHERE S#=SS# AND C#='C2'ORDER BY S#
D．SELECT S#,SNAME FROM S WHERE S# IN(SELECT SS#FROM SC WHERE C#='C2')