- If you don't want to spend any extra money then you can generate a CSV file from each of the databases and use Microsoft DTS to import CSV files generated from Oracle and use SQL*Loader/External table functionality to load/read CSV files generated by SQL*Server.
- There are quite a lot of ETL tools available which allow data transformation within databases and externally. Informatica PowerCentre is an example of such a tool that will allow you to carry out ETL between SQL Server and Oracle. You can also use Oracle's OWB for this, but it requires a bit more setup than Informatica.
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