1. IST 318 Database Administration
Lecture 5
Database Design

2. Topics Normalization From Logical Model to Physical Database Indexes
View

3. Normalization
Normalization is the process of identifying the one best place where each fact belongs
Benefits
Minimize redundancy
Optimize DB structure
By placing data members into the appropriate groupings
A normalized (logical) data model can be translated into a correctly organized physical DB

4. Normalization Non-atomic Data items Duplicated; Duplicated;
Variable items
The road to normalization is decomposition

5. Normalization – first normal form
form eliminates
repeating
groups and
nonatomic data
from an entity

6. Normalization – second normal form
Second normal form ensures that all the attributes of each entity are dependent

7. Normalization – third normal form
Third normal form ensures that no relationships between attributes exist within an entity

8. ER Diagram – the STUDENT data model