What is the main goal of the Third Normal Form (3NF)?
Practice Questions
Q1
What is the main goal of the Third Normal Form (3NF)?
To eliminate transitive dependencies
To ensure all attributes are dependent on the primary key
To remove duplicate rows
To create a unique identifier for each record
Questions & Step-by-Step Solutions
What is the main goal of the Third Normal Form (3NF)?
Correct Answer: To eliminate transitive dependencies.
Step 1: Understand what a database is. A database is a way to store and organize data.
Step 2: Learn about tables in a database. A table is like a spreadsheet with rows and columns.
Step 3: Know what a primary key is. A primary key is a unique identifier for each row in a table.
Step 4: Understand what non-key attributes are. These are the other pieces of information in a table that are not the primary key.
Step 5: Learn about dependencies. A dependency means that one piece of data relies on another piece of data.
Step 6: Know what transitive dependencies are. This happens when a non-key attribute depends on another non-key attribute instead of the primary key.
Step 7: Understand the goal of Third Normal Form (3NF). The goal is to remove transitive dependencies so that all non-key attributes depend only on the primary key.
Step 8: Realize that by achieving 3NF, we make the database more organized and reduce redundancy.
