How can I tell if any table data has changed?

HI
I'm in the process of reverse engineering an application. We don't have the source code, so I've been looking to the Oracle 8 database to give me some clues as to what insert, update, delete operations are being performed.
Is there any SQL I could run which would indicate the table data has been changed in some way.
Thanks
Glenn

What's the application architecture? Is this a client/server application? Or a three-tier application? Is there a lot of PL/SQL? Or is all the SQL getting generated in the application and sent to the database? Depending on the architecture, a SQL*Net trace on the client may be appropriate-- that will log the SQL the client app is sending to the server. If you have a three-tier app, though, it may be hard to relate the SQL to a particular operation or to relate the SQL statements to each other. If you have a lot of stored procedures, you'd only see the procedure call, not the SQL the procedure executes.
You could trace a particular database session, which has similar issues in a three-tier environment or if MTS (the precursor to shared server) is in use, but does capture SQL issued by stored procedures. That may put a degree of load on the database server as well.
You could also query the data dictionary (i.e. V$SQL) periodically to see the SQL statements in the shared pool. You have to ensure that you're polling frequently enough to catch SQL statements before they age out of the shared pool and you won't generally be able to relate one statement to another or to a particular application function. But you could see all the SQL the database is executing.
Justin

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