The DBKEY is what is used in order to identify the record instance inside the database at a certain address position. It is the practise of using line numbers in conjunction with page numbers. A four-byte address consists of the numbers 3 and 1, where 3 represents the page number and 1 represents the line number. Pages are always distinct in each and every one of the sections.  Direct Access: The record is persisted whenever the DBKEY is given, provided that the place in question is vacant.  Sequential Access: This kind of access saves each instance of a record one after the other and line by line.