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Q&A for science fiction and fantasy enthusiasts

-- find out registered users every month in 2019

-- find out the total number of users registered from
-- januarary  month X, in year 2019

SELECT b.mon, SUM(a.numRegistered) FROM
(
select MONTH(CreationDate) as mon, COUNT(*) as numRegistered from Users WHERE YEAR(CreationDate) = 2019 GROUP BY MONTH(CreationDate)
) a JOIN (
  select MONTH(CreationDate) as mon, COUNT(*) as numRegistered from Users WHERE YEAR(CreationDate) = 2019 GROUP BY MONTH(CreationDate)
) b ON a.mon <= b.mon
GROUP BY b.mon ORDER BY b.mon

fork query

edited aug 10

created aug 10 anonymous