Re: devide and summarize sql result (all)

=# SELECT name, perc/5*5 || '-' || perc/5*5+5 AS range, count(*) as matches FROM test GROUP BY name, perc/5 ORDER BY perc/5;

 name  | range  | matches 

-------+--------+---------

 franz | 75-80  |       1

 jason | 75-80  |       1

 franz | 80-85  |       1

 smith | 85-90  |       2

 smith | 95-100 |       2

(5 rows)