1. BTEC ICT – Unit 18
With Mr Griffiths

2. Lesson 43 – P2 notes – Normalise own DB
All students will:
Normalise their own database
Most students will:
Understand Normalisation
Some students will:
Begin Assignment 3

3. P21 Notes – part 3 Normalisation
Last lesson you learned what normalisation was (
Now you need to show the steps you take from:
An un-normalized database
1NF
2NF
3NF
Use the slides that follow to help you normalise your Radio Station database (we are pretending it is not built yet)

4. Un-normalized database
Here you show all the fields you think you will need in the database, minus the primary keys
Eg for a database to store album details:

5. 1NF Now show the same fields in 1NF
Remember the rules to apply for 1st Normal Form are:
Remove duplicate fields
Create a table for each entity and add primary keys

6. 2NF Rules for 2nd Normal Form:
Meet all the requirements of the first normal form.
Remove subsets of data that apply to multiple rows of a table and place them in separate tables.
Create relationships between these new tables and their predecessors through the use of foreign keys.

7. 3NF Meet all the requirements of the second normal form.
Remove columns that are not dependent upon the primary key.