The Raiser's Edge, The Financial Edge, The Education Edge, and Blackbaud Student Information System are relational databases. They are comprised of multiple tables linked on the back-end with the use of pointers. The pointers are called primary and foreign keys. Each table must have a primary key. This is a field that uniquely identifies each row in the table. The primary key links to a field in another table. This is called a foreign key. The System Record ID is the primary key for the Records Table. The Records Table is the table that stores biographical information.