Asking Database in UML

Hi, I’m a new user and still need to learn a lot about UML.
I want to ask anybody here, about the symbol of database in UML, as we know, in other diagram (DFD or else), database is symbolyzed by cylinder, but I cant found a symbol of database in UML, is it not defined?
and one more question, in UML, in which diagrams can we define a database? (if it defined).
Thanks for the answer before.