Jak najít medián v sql

Zkuste nahradit :

SUM(H_TIME) AS HANDLE_TIME

od :

MEDIAN(H_TIME) AS HANDLE_TIME

(řádek 3)

EDIT:Pro měsíce nahraďte:

select 
MONTH, WEEK, DAY,

Autor:

select 
MONTH,

A:

GROUP BY

MONTH
,WEEK
,DAY

Autor:

GROUP BY 
MONTH

Pro týdny nahraďte:

select 
MONTH, WEEK, DAY,

Autor:

select 
MONTH, WEEK,

A:

GROUP BY

MONTH
,WEEK
,DAY

Autor:

GROUP BY 
MONTH
,WEEK