"Appending" one database to another one is logically contradictory operation in principle. First, the databases should have matching
schema. The term "append" in inapplicable in principle, because it assumes the ordering relationship. The data in a database has no certain order from the client's perspective.
You can talk about
merging, which is not trivial. Data in the database obey certain
constraints such as uniqueness. Valid in each database, it can violate on merge.
Do this:
http://en.lmgtfy.com/?q=merge+database[
^]
—SA