Exact data relative to what? Are you just looking for a total number? How do you expect to use these numbers?

CPU and I/O stats for queries [currently in the cache] can be found here in sys.dm_exec_query_stats.

You can use this counter from SQL to watch the memory used by SQL Server:

SELECT *

FROM sys.dm_os_performance_counters

WHERE object_name = 'SQLServer:Memory Manager'

AND counter_name = 'Total Server Memory (KB)';

Look into Performance Monitor (perfmon) to monitor 'server memory available' if you're worried about external memory pressure.

Chapter 4: Troubleshooting SQL Server: A Guide for the Accidental DBA By Jonathan Kehayias and Ted Krueger