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http://searchoracle.techtarget.com/expe … 34,00.html
You have multiple solutions at your disposal. One, you an have MS Access dump each table’s contents to a text file. Then, have Oracle’s SQL*Loader load the contents of these text files into the Oracle database. Two, you can set up an ODBC connection to the Oracle database and have MS Access export directly to the database. Three, if you have SQL Server in your shop, you can use MS SQL Server’s Data Transformation Services (DTS) move the data for you. Fourth, if you want an Oracle solution, then you can download the Oracle Migration Workbench from Technet. When you download this toolkit, also make sure you download the MS Access component. This toolkit can connect to your Access database and move everything to Oracle for you. It works pretty slick!