Suddenly, something you described about this database trips a red flag for me.  Are you sure that your old database that someone gave you was theirs to give?
In the USA, we have a variety of laws about databases because the relevant laws fall into states' rights issues.  In Louisiana, breaking into someone else's database is a low-grade felony. 
I'm NOT accusing anyone of anything because it sounded pretty innocent at first.  However, getting into someone else's database - particularly if it contains personally identifiable information - could be considered a criminal act.  And if this is a police criminal records database, the content almost certainly will have PII to consider.  Therefore, before following through on breaking into the DB, verify the legality of what you are doing.