The JDBC driver is located in <DE_install_dir>/lib. Perform the following steps to replace the driver.
1. Shut down DE
2. Remove the ojdbc7.jar file from <de_install_dir>/lib.
3. Copy the downloaded ojdbc6.jar file to <de_install_dir>/lib.
4. Next, edit the classpath file in bin directory to update the file:
a. Navigate to <de_install_dir>/bin.
i. In Linux/UNIX OS edit classpath.sh and change the following to match the new filename
ii. In Windows OS, edit classpath.bat and change the following to match the new filename
5. Once the changes are done, start the server and test.
Note: Always backup the files before making any changes.