Re: count case when - PG 9.2

if you want see account_status and the count()- try this:

SELECT

CASE

WHEN AND c.regdate > EXTRACT(epoch FROM (now() - INTERVAL '14 day'))

THEN 'trial'

WHEN last_pay > EXTRACT(epoch FROM (now() - INTERVAL '37 day'))

THEN 'paying'

END as account_status,

c <http://c.id/>ount(*)

FROM public.clients c

WHERE (

(last_pay > EXTRACT('epoch' FROM now() - '12
Months'::INTERVAL))

)

group by 1

ORDER BY 1

10 Mar 2017 Cum, 00:02 tarihinde, Patrick B <patrickbakerbr(at)gmail(dot)com> şunu
yazdı:

> 2017-03-09 23:15 GMT+13:00 vinny <vinny(at)xs4all(dot)nl>:
>
> On 2017-03-09 05:27, Patrick B wrote:
>
> Hi guys. How can I count using 'CASE WHEN'?
>
> Example:
>
> SELECT
>
>
> CASE
>
>
> WHEN AND c.regdate > EXTRACT(epoch FROM (now() - INTERVAL
> '14 day'))
>
>
> THEN 'trial'
>
>
> WHEN last_pay > EXTRACT(epoch FROM (now() - INTERVAL '37
> day'))
>
>
> THEN 'paying'
>
>
> END as account_status,
>
>
> c.id [1]
>
>
> FROM public.clients c
>
>
> WHERE (
>
>
> (last_pay > EXTRACT('epoch' FROM now() - '12
> Months'::INTERVAL))
>
>
> )
>
>
> ORDER BY 1
>
> I wanna know how many of 'trial' and 'paying' customers the query
> returns. can you guys please advice how to do it?
>
> Thanks
> Patrick
>
>
> comparisons like "A>B" return a boolean. Booleans can be cast to integers,
> and integers can be summed.
>
> SUM((A>B)::int)
>
> But depending on the situation, indexes etc it could be faster to run e
> separate count query, you'll have to test that.
>
>
>
> Could you please guys give me a query as an example?
>
> Thanks
> P.
>