Re: group by range of values

On 7/27/07, Carol Cheung <cacheung(at)consumercontact(dot)com> wrote:
> Something like:
>
> decade | average(salary)
> -------+-----------------
> 1940 | 69500
> 1950 | 53333.33
> 1960 | 53000
> 1970 | 40333.33

CREATE TABLE tester (
birth_year integer,
salary numeric(10,2)
);

SELECT
SUBSTRING(TO_CHAR(BIRTH_YEAR,'FM9999') FROM 1 FOR 3)||'0'
AS DECADE
, AVG(SALARY) AS AVG_SALARY
FROM TESTER
GROUP BY
SUBSTRING(TO_CHAR(BIRTH_YEAR,'FM9999') FROM 1 FOR 3)||'0'
ORDER BY DECADE;