Question
Which of the following statements about normalization in
relational databases is correct?Solution
Normalization is a systematic approach in relational database design to organize data into multiple related tables. The primary objective is to reduce data redundancy and eliminate undesirable characteristics like update anomalies, insertion anomalies, and deletion anomalies. By splitting a database into smaller, well-structured tables, normalization ensures that each piece of data is stored only once, enhancing data integrity and consistency. The process involves dividing attributes into separate tables based on their functional dependencies, proceeding through normal forms like 1NF, 2NF, 3NF, and BCNF. For example, in a student database, separating the student’s personal details from their course details helps avoid redundancy and maintain accuracy. Why Other Options Are Incorrect :
- Normalization ensures data redundancy for performance improvement : Normalization minimizes redundancy, not ensures it.
- The goal of normalization is to create a single flat table with all the data : Normalization involves splitting data into multiple related tables, not consolidating into one.
- Denormalized tables are more efficient for transaction processing than normalized ones : Normalized tables are generally more efficient for transaction processing because of reduced redundancy. Denormalized tables may be optimized for read-heavy operations in certain contexts.
- First Normal Form (1NF) ensures that functional dependencies are maintained : 1NF focuses on eliminating repeating groups and ensuring atomicity, not functional dependencies.
When was the Madras Guaranteed Railway Company formed?
Which railway station has received the IGBC’s ‘Green Railway Station’ certification with platinum rating in 2023?
The government has approved laying a new broad-gauge railway line connecting Rameshwaram with _______________________
Which of the following is an example of public goods?
The Konkan Railway was formed in the year:
When was Indian Railway Finance Corporation established?
What is the meaning of yellow light in railway?
______ implies transformation of various inputs into outpur, thereby increasing the want-satisfying capacity of inputs.
The Length of Darjeeling Himalayan Railway is ___________________
The Canadian Pacific Railway runs between ________________________