Hi DBAs, Oracle 8.1.6 on Sun; DW environment: Have a table that gets populated by SQL*Loader and thereafter lots of queries go against this table using different combinations of 4 columns (date, varchar2(6), varchar2(5), char(1)). Once a row is processed, the char(1) column gets updated from null to 'Y'. There are no updates to any other columns or no deletes. Roughly 1000 rows gets inserted to this table every day. When I tried 'explain plain' for different queries, I find that a bitmap index on these 4 columns performs much better than a normal index. Before implementing this, would like to get your ideas on this. Appreciate any help! Prakash -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Bala, Prakash INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).