sql命令顯示列中最高的重複字段

Question

如何在sql中顯示列中最高的重複字段？

用於例如如果列包含：

 
jack 
jack 
john 
john 
john 

如何顯示最大重複字段（即）從上述柱約翰？

Answer 1

select chairman 
from mytable 
group by chairman 
HAVING COUNT(*) = (
select TOP 1 COUNT(*) 
from mytable 
group by chairman 
ORDER BY COUNT(*) DESC) 

Answer 2

select name from persons 
group by name 
having count(*) = (
    select count(*) from persons 
    group by name 
    order by count(*) desc 
    limit 1)