Database Systems: Design Implementation & Management
11th Edition
ISBN: 9781305850378
Author: Coronel
Publisher: Cengage
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Chapter 6, Problem 3RQ
Program Plan Intro
Normalization:
The process used to minimize data redundancy and dependency in a relational
- The database table is divided into two or more tables and defines the relationship between those tables.
- If the modifications, deletion or updates occur in one table, the other tables in database get updated by just propagating it.
- In a relational database, the tables with no redundant data and less null values are considered as efficient table.
- This is because, having redundant data and more null values increases the storage space and wastage of memory is imminent.
- Null values cause a problem for data integrity and produces more error in the database.
- If the wasted storage space and null values which cause data integrity hazards are minimized, a highly optimized relational database can be designed.
- The project team should consider using normalization when designing the database, which is the best source to optimize data storage efficiently; this is because, it reduces the data storage space and provides data integrity.
- There are three types of normal forms.
- First normal form (1NF)
- Second normal form (2NF)
- Third normal form (3NF)
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