Re: Jitter from MIN and MAX Response time

You are missing END in CASE statement.

MAX(CASE WHEN ResponseTime.MinResponseTime IS NULL THEN 0 ELSE ResponseTime.MinResponseTime END) - MIN(CASE WHEN ResponseTime.MaxResponseTime IS NULL THEN 0 ELSE ResponseTime.MaxResponseTime END) AS JITTER

or you can use COALESCE which isn't so chatty

MAX(COALESCE(ResponseTime.MinResponseTime,0))- MIN(COALESCE(ResponseTime.MaxResponseTime,0)) AS JITTER