Chapter 6, Problem 1RQ

Explanation of Solution

Normalization:

The process used to minimize data redundancy and dependency in a relational database is known as normalization.

• 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)