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.
Statements: A ≥ B ≥ Y = Z = M ≥ N ≤ E ≤ F = J
Conclusions:
I. F > Z
II. J ≤ Y
...Statements: F > V > W ≥ L > G; F ≤ O = M < I
Conclusions: I. M > LÂ Â Â II. V < I
In the question, assuming the given statements to be true, find which of the conclusion (s) among given three conclusions is /are definitely true and t...
Statement: A ≥ B ≥ C = D > E, F > G = H ≤ CÂ
Conclusion: I. C ≥ F                         II. F > D
...In the question, assuming the given statements to be true, find which of the conclusion (s) among given three conclusions is/are definitely true and th...
Statements: T < Q ≥ L; W < Q ≥ E; E < S
Conclusions:
I. T < S
II. S > Q
III. E < L
Statements:
B > L > M ; M = W ; L < Q
Conclusions:
I. W < L
II. M < B
III. B > Q
Statements : R < O ≤ P < Q; M < L ≤ N > O; S < Q ≤ K
Conclusions:
I. M < K
II. N > R
III. O < S
Statements: P < Q = S ≥ U; V ≤ P ≥ N > I
Conclusions: I. U < V II. Q > I
...Statements: J ≤ K = L ≤ N; N ≤ O = M
Conclusions: I. M = JÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â II. J < M
...