Because the sample database is populated with sample data and used primarily for test purposes, typically it is only necessary to use Microsoft Access as the vendor database. The amount of data does not require the high-end performance provided by other vendors.
Keep in mind that when you specify database parameters, case sensitivity may apply to the vendor database you choose. For more information on database case-sensitivity and properties, see the related link.
If you plan to use DB2u, ORACLE, or SQL Server, you must first create an empty database container using tools provided by the database vendor. For information on creating empty vendor database containers, see the chapter, Configuring Vendor Databases in the IBM Rational ClearQuest and ClearQuest MultiSite Installation and Upgrade Guide.