查询student表中的所有非空email信息，以下语句正确的是（）。A、Select email from student where email !=nullB、Select email from student where email not is nullC、Select email from student where email <> nullD、Select email from student where email is not null - 搜题匠

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题目内容(请给出正确答案)

查询student表中的所有非空email信息，以下语句正确的是（）。

A、Select email from student where email !=null
B、Select email from student where email not is null
C、Select email from student where email <> null
D、Select email from student where email is not null

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