Excel or OpenOffice.org Calc reading and writing to database

Hi,

I am trying to write a system for managing documents. The program
already generates documents in .ODS and .ODT files from data gathered
in Oracle Database, but I have no idea, how to manage the other side -
writing from OO Document (or MS Document) to database.

Has anyone encountered similiar problem?

Any hints/advice will be helpfull.

Łukasz

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