Third Normal Form

In this lesson, we will discuss the concept behind 3NF using an example.

We'll cover the following...

Third normal form (3NF)

For a table to be in the third normal form:

  1. It should be in the second normal form.

  2. It should not have transitive dependency.

Example

SCORE Table

Std_Id Subject_Id Marks_obtained Exam_Type Total_Marks
1 CS-100 50 Final 100
2 CS-100 70 Final 100
3
...