revolverhuset / mokkameister Goto Github PK

mokkameister::DATABASE=> select count(*), DATE_TRUNC('month', created) as monthyear from brewings where "coffee-type" = 'regular' and DATE_TRUNC('month', created) != DATE_TRUNC('month', CURRENT_DATE) group by monthyear;
 count |      monthyear
-------+---------------------
    35 | 2016-08-01 00:00:00
    43 | 2015-11-01 00:00:00
    51 | 2016-05-01 00:00:00
    81 | 2015-07-01 00:00:00
    63 | 2016-11-01 00:00:00
    63 | 2016-09-01 00:00:00
    51 | 2016-06-01 00:00:00
    64 | 2016-04-01 00:00:00
    40 | 2015-10-01 00:00:00
    53 | 2015-08-01 00:00:00
    50 | 2016-02-01 00:00:00
    44 | 2015-06-01 00:00:00
    37 | 2015-12-01 00:00:00
    47 | 2016-07-01 00:00:00
    44 | 2016-12-01 00:00:00
    48 | 2016-03-01 00:00:00
    39 | 2016-10-01 00:00:00
    44 | 2017-01-01 00:00:00
    42 | 2016-01-01 00:00:00
    36 | 2015-09-01 00:00:00
(20 rows)

mokkameister::DATABASE=> select avg(permonth.count), stddev(permonth.count) from (select count(*), DATE_TRUNC('month', created) as monthyear from brewings where "coffee-type" = 'regular' and DATE_TRUNC('month', created) != DATE_TRUNC('month', CURRENT_DATE) group by monthyear) as permonth;
         avg         |       stddev
---------------------+---------------------
 48.7500000000000000 | 11.5160071662287350
(1 row)```