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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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单选题查询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 emailnotisnullC
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单选题查询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
考题
单选题查询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 emailnullD
Select email from student where email is no tnull
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