not a lawyer, but from a law course I remember that information is not subject to copyright. article 1259 of the civil code, paragraph 6.4: "are not objects of copyright messages on events and facts having an exclusively informational nature."
and your database will already be subject to copyright.
on the other hand, perhaps there company names or descriptions will meet all of these words with notes ® and (TM) around that do not know how to dance.
in General, no legal advice is necessary