SQL
AخA
USE dewiki_p;
SELECT count(*) AS May2017 FROM user WHERE user_registration < 20170601000000;
SELECT count(*) AS Mar2017 FROM user WHERE user_registration < 20170401000000;
SELECT count(*) AS Dec2016 FROM user WHERE user_registration < 20170101000000;
SELECT count(*) AS Sep2016 FROM user WHERE user_registration < 20161001000000;
SELECT count(*) AS Jun2016 FROM user WHERE user_registration < 20160701000000;
SELECT count(*) AS Mar2016 FROM user WHERE user_registration < 20160401000000;
SELECT count(*) AS Dec2015 FROM user WHERE user_registration < 20160101000000;
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