What is a relational model

A relational database is based on a relational model, which consists of three parts:

Data structure--a collection of objects and types that the model operates

Integrity rules--a constraint that ensures data is valid and correct

Data manipulation-How the model objects are allowed to operate

A relationship (relation) is a two-dimensional table of rows and columns in which each row in a table is a record, and each column is a field of records.

Each record in the table must be mutually exclusive, and the value of the field must be atomic.