Simple and composite attributes

Composite attributes: 

Composite attributes can be divided into smaller subparts. These subparts represent the basic attributes with independent meanings of their own. For example, take Name attributes. We can divide it into sub-parts like First_name, Middle_name, and Last_name.

Simple Attributes:

Attributes that can’t be divided into subparts are called Simple or Atomic attributes. For example, Employee Number is a simple attribute. Age of a person is a simple attribute.