Hello!
In a PostgreSQL 8.4.13 why doesn't this please
deliver a floating value (a quotient between 0 and 1):
select
id,
count(nullif(nice, false)) - count(nullif(nice, true)) /
count(nice) as rating
from pref_rep where nice is not null
group by id
;
id
Because you're calculating a - (b/c) instead of (a-b)/c
On 11 June 2013 11:51, Alexander Farber alexander.far...@gmail.com wrote:
Hello!
In a PostgreSQL 8.4.13 why doesn't this please
deliver a floating value (a quotient between 0 and 1):
select
id,
count(nullif(nice,
Hello,
On Tue, Jun 11, 2013 at 11:59 AM, Alban Hertroys haram...@gmail.com wrote:
Because you're calculating a - (b/c) instead of (a-b)/c
On 11 June 2013 11:51, Alexander Farber alexander.far...@gmail.com wrote:
Alexander Farber wrote:
In a PostgreSQL 8.4.13 why doesn't this please
deliver a floating value (a quotient between 0 and 1):
select
id,
count(nullif(nice, false)) - count(nullif(nice, true)) /
count(nice) as rating
from pref_rep where nice is not null
Whoops, forgot to keep it on the list.
On 06/11/2013 11:51 AM, Alexander Farber wrote:
Hello!
In a PostgreSQL 8.4.13 why doesn't this please
deliver a floating value (a quotient between 0 and 1):
You should upgrade to 8.4.17.
select
id,
count(nullif(nice, false)) -
