# Attributes

### **Types of Attributes**

**Simple Attribute - Atomic Values.**

*Example: ssn*

**Composite Attribute - Made up of more than one simple attribute.**

Example: firstname + mi + lastname

**Derived Attribute: Calculated from existing attributes**

*Age: Derived from DOB*

<figure><img src="https://files.gitbook.com/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F3rYrt4i5KktNWaUgKLIM%2Fuploads%2Fdn30vtjZwig8IfrtDLVN%2F01_attributes.png?alt=media&#x26;token=9b9680cf-5003-4922-bc32-4404fa14a177" alt=""><figcaption></figcaption></figure>

Student: Entity\
Name: Composite Attribute\
Student ID: Simple Attribute\
Age: Derived Attribute\
PhoneNo: MultiValued Attribute\
(The Student can have more than one phone number)