Re: [GENERAL] how to use aggregate functions in this case

[BladeOfLight16]

On Sun, Aug 25, 2013 at 8:36 PM, BladeOfLight16 <bladeofligh...@gmail.com>wrote:

> This appears to be some kind of equal interval problem.
>
> SELECT  v_rec1.user,
>         WIDTH_BUCKET(v_rec_fts.lev, 0, 100, 4) AS bucket
>         COUNT(*) as count,
> FROM v_rec2
> GROUP BY user, bucket;
>
> (Untested, but this should be the gist.)
>
> Bucket 1 would be 0 to 25, bucket 2 is 25 to 50, 3 is 50 to 75, 4 is 75 to
> 100. If you really need to change the bucket number to some kind of text,
> you can probably nest this query inside another that uses a CASE to pick
> the text based on on the bucket number.
>
> Good luck.
>

Then again, I guess you don't need a nested query.

SELECT  v_rec1.user,
        CASE WIDTH_BUCKET(v_rec_fts.lev, 0, 100, 4)
              WHEN 1 THEN '0 to 25'
              WHEN 2 THEN '25 to 50'
              WHEN 3 THEN '50 to 75'
              WHEN 4 THEN '75 to 100'
              ELSE 'But how?'
        END CASE AS quarter_percentage
         COUNT(*) as count,
FROM v_rec2
GROUP BY user, quarter_percentage;