File Extension DB
File extension DB is most commonly used by database files of different kinds. These files can be created with any of the following software packages: Oracle, Paradox, Mozilla Firefox, Windows XP and many others.
Database files usually consist of uniform structured records that are stored in binary form that is optimal for quick basic operations such as insert, update, delete as well as speedy lookups based on some search criteria. An example of lookup would be finding all invoices issued to company X during last 7 days. Fast loookups are usually performed with the help of index trees.