• 2022-10-26
    现要从SC表中查找缺少学习成绩(G)的学生学号(S#)和课程号(C#),正确的SQL是
    A: SELECT S#,C# FROM SC WHERE G=0
    B: SELECT S#,C# FROM SC WHERE G<=0
    C: SELECT S#,C# FROM SC WHERE G=NULL
    D: SELECT S#,C# FROM SC WHERE G IS NULL
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