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 1 end) 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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