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select owneruserid from posts p join users u on p.owneruserid=u.id
where owneruserid not in (select distinct owneruserid from posts 
where posttypeid=1 and year(creationdate)=2015 and owneruserid is not null) and 
owneruserid in (select distinct owneruserid from posts 
where posttypeid=2 and year(creationdate)=2014 and owneruserid is not null)

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edited nov 17

created nov 17 anonymous