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select hacker_id,name from hackers h where h.hacker_id in(select hacker_id from challenges where score in(select max(score) from submissions))group by h.hacker_id,having count(h.hacker_id)>1 order by h.hacker_id asc;
but generating errors
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Dude even the below code is also correct
select hacker_id,name from hackers h where h.hacker_id in(select hacker_id from challenges where score in(select max(score) from submissions))group by h.hacker_id,having count(h.hacker_id)>1 order by h.hacker_id asc;
but generating errors