Sådan finder du medianen i sql

Prøv at erstatte :

SUM(H_TIME) AS HANDLE_TIME

af :

MEDIAN(H_TIME) AS HANDLE_TIME

(linje 3)

EDIT:For månederne skal du erstatte:

select 
MONTH, WEEK, DAY,

Af:

select 
MONTH,

Og:

GROUP BY

MONTH
,WEEK
,DAY

Af:

GROUP BY 
MONTH

For ugerne skal du erstatte:

select 
MONTH, WEEK, DAY,

Af:

select 
MONTH, WEEK,

Og:

GROUP BY

MONTH
,WEEK
,DAY

Af:

GROUP BY 
MONTH
,WEEK