Hello,
There is no direct integration between the AdWords API and any
particular type of database, or particular database setup. The AdWords
API provides access to AdWords data from a high-level programming
language and then it is up to the developer to make use of that data
as he or she sees fit--if you're able to write code to read and update
your local database then you should be able to achieve the integration
you're looking for.
Cheers,
-Jeff Posnick, AdWords API Team