percentile_disc vs percentile_cont
I found this explanation very helpfulhttp://mfzahirdba.blogspot.com/2012/09/difference-between-percentilecont-and.html
ITEM REGION WK FORECASTQTY ---- ---------- ---------- ----------- TEST E 3 137 TEST E 2 190 TEST E 1 232 TEST E 4 400SELECT t.* , PERCENTILE_CONT(0.5) WITHIN GROUP ( ORDER BY forecastqty) OVER (PARTITION BY ITEM , region ) AS PERCENTILE_CONT , MEDIAN(forecastqty) OVER (PARTITION BY ITEM , region ) AS MEDIAN , PERCENTILE_DISC(0.5) WITHIN GROUP ( ORDER BY forecastqty) OVER (PARTITION BY ITEM , region ) AS PERCENTILE_DISC FROM t ; ITEM REGION WK FORECASTQTY PERCENTILE_CONT MEDIAN PERCENTILE_DISC ---- ---------- ---------- ----------- --------------- ---------- --------------- TEST E 3 137 211 211 190 TEST E 2 190 211 211 190 TEST E 1 232 211 211 190 TEST E 4 400 211 211 190