Hello Oracle-L Oracle DB : 10.2.0.4 OS : IBM AIX DB SIZE : 5TB Table Size : 600GB Application : Baking System - OLTP. Busy system. I have to RANGE partition on date field. Looking at the size of the table, I am confused which method to follow. In the past I have performed using DBMS_REDEFINITION and IMP-EXP feature for small tables i.e. <50GB. This time, I am worried by looking at the size of the table. Could you please suggest better or reliable way partitioning with minimum downtime or no downtime.? Cheers, Sameer <http://www.choudhari.net>