In addition to selecting OSS Notes related to upgrades, you can also go directly to the Release and Upgrade area on the SAP support portal.
Doing this type of searching in the SAP Support Portal requires a great deal of repeated searching. Therefore, it makes a lot of sense to use their single sign on. You can apply for it by Applying for an SAP Passport.
Its good to backup this passport in order to use it on other computers.
Now instead of asking for a logon when you type in http://service.sap.com/ you will be greeted with:
You can find pretty much anything about a release from the Support Website including which database platforms it works with.
