Normalization in Oracle PL SQL Interview Questions And Answers For Experience & Freshers | Interview Preparation
Normalization is the process to decompose the table into number of tables. Normalization is used to reduce the duplicate data.
There are two types of Duplicity :
1) Row Level Duplicacy
2) Column Level Duplicacy
Before Normalization insertion, updation, deletion problems occur. By using Normalization we can avoid insertion, updation ,deletion problems.
Types of the normalization:
1) First Normal Form (1NF)
2) Second Normal Form (2NF)
3) Third Normal Form (3NF)
4) BCNF (Boyce Codd Normal Form)
5) Fourth Normal Form (4NF)
6) Fifth Normal Form (5NF)
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