Question
What is the primary advantage of using Normalization in
a database design?Solution
Normalization is the process of organizing a relational database in such a way that it reduces redundancy and eliminates undesirable characteristics like insertion, update, and deletion anomalies. The goal of normalization is to ensure that:
- Data redundancy is minimized, which reduces storage costs and prevents inconsistent data.
- Data dependency is minimized by breaking down large tables into smaller, manageable ones and linking them via foreign keys.
- A is incorrect because normalization does not necessarily reduce the number of tables but instead organizes data across multiple tables more effectively.
- B is incorrect because normalization is aimed at reducing redundancy and improving data integrity, not increasing redundancy. It might slightly decrease query performance due to the increase in joins between tables.
- D is incorrect because normalization might not directly improve query performance; it can actually slow it down due to the increased number of joins.
- E is incorrect because, while normalization introduces some complexity in the schema (due to the use of foreign keys), its primary goal is not to increase complexity but to organize data in a way that reduces redundancy and dependency.
The present age of A is 7/5 times to that of his marriage age. Present age of his brother is 1/2nd of his present age. If A was married 20 years ago the...
The current ratio of the ages of 'Armaan' and 'Bittu' is such that six years from now, it will be 5:4, respectively. Presently, 'Chetna's age exceeds 'B...
Amit age after 15 years will be 2 times his age 2 years back. What is the present age of Amit?
Eight years ago, the ratio of Raman's age to Chaman's age was 4:5. Twelve years from now, this ratio will change to 13:15. Calculate the current average...
Novita's current age is 37.5% greater than Suzuka's, with a difference of 15 years between their ages. Calculate the ratio of Novita's age to Suzuka's a...
Twelve years ago, the average age of a family having four members (father, mother, son and daughter) is (y-2) years. The ratio between the present ages ...
A father is four times as old as his son. In 10 years, the father will be twice as old as his son. What is the son’s present age?
The ratio of the present age of A to that of B is 7:9. Six years ago the ratio of 1/3 of A’s age at that time and 1/3 of B’s age at that time was 1:...
- 10 years from now, the combined ages of P and Q will be 84 years. 6 years ago, the ratio of their total age to R’s age was 5:3. What is the present age o...
Shruti is currently 20% younger than Suhana. In four years, the age difference between them will change so that Suhana’s age will be to Shruti’s age...