单选题查询student表中的所有非空email信息,以下语句正确的是()。ASelect email from student where email !=nullBSelect email from student where email not is nullCSelect email from student where email nullDSelect email from student where email is not null

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 !=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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