Here are the pre-reqs. with links to all db Drivers
http://docs.splunk.com/Documentation/DBX/latest/DeployDBX/Supporteddatabases
Link to set up check list:
http://docs.splunk.com/Documentation/DBX/latest/DeployDBX/Checklist
Link with instructions to install the drivers.
http://docs.splunk.com/Documentation/DBX/2.1.2/DeployDBX/Installdatabasedrivers
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