Re: count(boolean)

Dan,

Try:

SELECT question_id AS id,  count( case when value then 1 else 0 end) as count_true, count( case when value then 0 else
1end) as count_false
 
FROM answers_boolean
GROUP BY question_id;



jll

Dan MacNeil wrote:
> 
> I have a table answers_boolean:
> 
>  question_id   | integer   | not null
>  evaluation_id | integer   | not null
>  value             | boolean |
> 
> I'd like output in the form:
> 
> question_id,  count_true, count_false
> 
> ....where count_true is the number of questions answered "true"
> 
> SELECT
>     question_id AS id, value AS val , count(value) AS cnt
> FROM
>      answers_boolean
> GROUP BY
>      question_id,value;
> 
> gives me:
>  id | val | cnt
> ----+-----+-----
>   2 | f   |   3
>   2 | t   |   3
>   3 | f   |   2
>   3 | t   |   4
> 
> ...which is sorta what I want.
> 
> I've looked through the docs & archive but haven't found the answer.
> 
> TIA
> 
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