Select signal_wait_time_ms=sum(signal_wait_time_ms) ,'%signal waits' = cast(100.0 * sum(signal_wait_time_ms) / sum (wait_time_ms) as numeric(20,2)) ,resource_wait_time_ms=sum(wait_time_ms - signal_wait_time_ms) ,'%resource waits'= cast(100.0 * sum(wait_time_ms - signal_wait_time_ms) / sum (wait_time_ms) as numeric(20,2)) From sys.dm_os_wait_stats