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SQL Print Prime Numbers MediumSQL (Advanced) HackerRank Solution
with numSel as (
select level num from dual connect by level <= 1000
),
primes as (
select a.num p
from numSel a, numSel b
where b.num <= a.num
group by a.num
having count(case a.num/b.num when trunc(a.num/b.num) then 'Y' end) = 2
)
select listagg(p, '&') within group (order by p)
from primes
;
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