SuiteCRM Add Duplicate Field Criteria

SuiteCRM Add Duplicate Field Criteria.
In SuiteCRM; the default criteria for duplicate import field is First Name and Last Name and Referrer. If you want to add another criteria; then you have to modify the SuiteCRM database. This video shows you how. Mostly for my own benefit if I need to do it in the future so I don't have to read a few dozen vague blog posts that don't answer the question.