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Postgresql group by day, week and month examples
at the end of any product there will be a reporting interfaces for counts. let say you build a advertisement site which gives people to publish their products on the site. they will want to see how many people visited their product in daily basis or weekly.
I used to do this in mysql like this
SELECT create_time as Date, count(id) as 'Count', FROM
views_of_product
group by date_format(create_time, '%d %m %Y')
order by date_format(create_time, '%Y-%m-%d') desc limit 7
this will nicely show last seven days views. but I needed to do same thing in postgresql. and like other days its not easily to find. I should check other report codes from project but no I allways research on google :) anyway here is my code:
select to_char(created, 'YYYY-MM-DD') ,count(id)
from videos_capture
group by to_char(created, 'YYYY-MM-DD')
order by to_char(created, 'YYYY-MM-DD') desc limit 7
its not bad actually works like a charm but understanding this code is not …
I used to do this in mysql like this
SELECT create_time as Date, count(id) as 'Count', FROM
views_of_product
group by date_format(create_time, '%d %m %Y')
order by date_format(create_time, '%Y-%m-%d') desc limit 7
this will nicely show last seven days views. but I needed to do same thing in postgresql. and like other days its not easily to find. I should check other report codes from project but no I allways research on google :) anyway here is my code:
select to_char(created, 'YYYY-MM-DD') ,count(id)
from videos_capture
group by to_char(created, 'YYYY-MM-DD')
order by to_char(created, 'YYYY-MM-DD') desc limit 7
its not bad actually works like a charm but understanding this code is not …
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