What is meant by DDBB? Today we got a term DDBB. I am not sure whether it refer normal database or database driver in certain programming language.

Google search did not help me much in this. And I am sure it is not 'Dirty Dozen Brass Band'.
BBDD are Bases de Datos in this funny way in which Spanish refers to plural for acronyms (EEUU, Estados Unidos = United States). 
http://forum.wordreference.com/showthread.php?t=390785