Am i able to do a search for duplicates in the database?
Yes - go to Contacts menu » Find and Merge Duplicate Contacts.  There is dedupe documentation available.

The tricky question is, "What represents a duplicate contact?".  For some organizations, two contacts with the same record might be a duplicate; for others, that's not enough to determine if it's a duplicate.  

So while the Using rules and merging duplicate contacts manually section of the documentation might be all you need (e.g. if you can use the built-in "match on emails only" rule), you may need to read the rest to tell CiviCRM what constitutes a duplicate for your organization.