多选题 : 假设表A的city字段有三个值(BJ、BeiJing、beijing),只有BJ合法,下列查询异常值的SQL错误的是?()
(A)select*fromAwherecityin(’BeiJing’,’beijing’)
(B)select*fromAwherecity=’BeiJing’andcity=’beijing’
(C)select*fromAwherecitylike’BJ%’
(D)select*fromAwherecity<>’BJ’
参考答案
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