問題詳情
41）查詢选修了课程号为'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 BY S.S#
(D)SELECT S.S#，SNAME FROM S WHERE S.S# IN (SELECT SC.S# FROM SC WHERE C# ='C2' )
參考答案
答案：A
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)