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Q&A for students, teachers, and linguists wanting to discuss the finer points of the Japanese language

select count(*)
from
(
select count(p.id) as postsum, u.id as userid
from users u
left outer join posts p on p.parentid = u.id
group by u.id
) as ussum
where postsum = '0'

fork query

edited dec 1

created dec 1 anonymous