Hi All, Is my query correct SELECT t1.from_uri as orig_number, t1.to_uri as term_number, TIMEDIFF(t2.time, t1.time) as duration, t1.timestamp as calldate FROM acc t1, acc t2 WHERE t1.sip_callid = t2.sip_callid AND ((t1.fromtag = t2.fromtag and t1.totag = t2.totag) OR (t1.fromtag = t2.totag and t1.totag = t2.fromtag)) AND t1.sip_method='INVITE' AND t2.sip_method='BYE' also this query displays all calls fron all user and it shows also all the previos month, what can I add here to show only calls from a certain user e.g 2009 and the current month? I tried this: SELECT t1.from_uri as orig_number, t1.to_uri as term_number, TIMEDIFF(t2.time, t1.time) as duration, t1.timestamp as calldate FROM acc t1, acc t2 WHERE t1.sip_callid = t2.sip_callid AND ((t1.fromtag = t2.fromtag and t1.totag = t2.totag) OR (t1.fromtag = t2.totag and t1.totag = t2.fromtag)) AND t1.sip_method='INVITE' AND t2.sip_method='BYE' AND t1.username="2009" and t1.time REGEXP '-08-'; <--- I added this line but i had an error, hope someone can help me. thank you. regards, nhadie