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

select yr, mm, cnt, prev, round(100-cnt*100.00/prev, 2) as prc
from
(select yr, mm, cnt, lag(cnt) over (order by yr, mm) as prev
from
(select year(CreationDate) as yr, month(CreationDate) as mm,
count(*) as cnt
from posts
where PostTypeId between 1 and 2
group by year(CreationDate), month(CreationDate)
) as x
) as y
where cnt < prev
order by yr, mm

fork query

edited nov 30

created nov 18 19 anonymous