The phrase "largest database" refers to a collection of information or data that is bigger or more extensive than any other database. It means that this particular database contains a vast amount of data compared to others available. Full definition
Historically back before computers, the only large databases of of - age citizens and their addresses which states had easy access to was their voter rolls. (law.stackexchange.com)
With large database of information of people who are over 50 looking for other mature singles, it's easy to get the soul mates from online. (senior-dating-sites.com)
Large database for special preferences and get person to show approach and interact with people who seem lose themselves in service to others. (petesgrillandpizza.com)