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Q&A for music historians, critics, and fans

select distinct year, count(tagid)
from
(
select tagid, min(creationdate) as min_date, year(min(creationdate)) as year
from posts p
inner join posttags pt
on pt.postid = p.id
group by tagid
) a
group by year

fork query

edited nov 7

created nov 7 anonymous