Thank you for your response.
I tried this but he Shows me a message :
The user does not have EXECUTE FUNCTION access to SYSLIB.MonitorSession :s
MonitorSession returns info about all sessions, only DBAs are usually allowed to do this.
If you only want to see your queries you can try:
SELECT * FROM TABLE (MonitorMySessions()) AS dt;
If this fails, too, you need to ask your DBA if he can grant you access (or use Viewpoint)
If you do resort to using Viewpoint, there are options for the DBA to limit what queries can be viewed through the MyQueries portlet or Query Groups.