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Q&A about the site for science fiction and fantasy enthusiasts

select count(*)
from users u 
where id not in (select p.owneruserid from posts p 
where year(p.creationdate) = 2018 and p.posttypeid = 1 and p.owneruserid is not null)

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edited nov 16 19

created nov 16 19 jon.doe32664