Relational structures divide your data into related pieces.
A relational data structure divides your information into logical pieces, and places each piece in a separate table. Now, wasn't that easy?
For example, a sales database typically puts information about customers — their names, addresses, and other key facts — in one table, and information about what those customers buy in another table.
Organizing your data that way can make it quite powerful. Keep going to find out more.