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

select sum(case when Users_Post_Counter.Count = 0 then 1 else 0 end)
from (
select (
select count(*)
from Posts
where Posts.OwnerUserId = Users.Id
) as Count
from Users
) as Users_Post_Counter;

fork query

edited dec 1

created dec 1 anonymous