BN, You might also look into the Logical Standby Database, if the performance requirements aren't too severe. I'm assuming this is based on materialized views, so should be platform-independent. Here is an asktom article with the basics. http://asktom.oracle.com/pls/ask/f?p=4950:8:::::F4950_P8_DISPLAYID:5796841276215 I haven't used this but perhaps someone else on the list has experience with it. Dennis Williams