Database Normalization - 1NF, 2NF, 3NF, with example/ in Amharic | በአማርኛ | скачать в хорошем качестве

Database Normalization - 1NF, 2NF, 3NF, with example/ in Amharic | በአማርኛ |

This video focus on the basics of database normalization, focusing on 1NF, 2NF, and 3NF with examples, could be structured as follows: Briefly explain what database normalization is. Highlight its importance in reducing redundancy and improving data integrity. 1. First Normal Form (1NF) Explain that a table is in 1NF if it contains only atomic (indivisible) values. Show a sample table with non-atomic values (e.g., multiple phone numbers in one cell) and convert it to 1NF by separating them into individual rows. 2. Second Normal Form (2NF) Explain that a table is in 2NF if it is in 1NF and all non-key attributes are fully functionally dependent on the primary key. Present a table with partial dependencies (e.g., a table with student ID and course information) and demonstrate how to split it into two tables to achieve 2NF. Highlight the elimination of partial dependency. 3. Third Normal Form (3NF) Explain that a table is in 3NF if it is in 2NF and all the attributes are functionally dependent only on the primary key (no transitive dependencies). Show a table that has transitive dependencies (e.g., storing instructor details with course info) and demonstrate how to separate it into additional tables. Stress the importance of eliminating transitive dependencies.