多项选择题
A.select max(score)from grade B.select top1score from grade order by score asc C.Select min(score)fromgrade D.select top1score from grade order by score desc
A.SELECT phone FROM authors WHERE phone LIKE’4[1,0]%’ B.SELECT phone FROM authors WHERE phonein’4[^10]%’ C.SELECT phone FROM authors WHERE phone LIKE’4_[1,0]%’ D.SELECT phone FROM authors WHERE phone between’41%’and’40%’
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 no tnull