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 :
At least some singers are dancers. Some dancers are not lyricist.
Statements:
No teacher is a subject.
No subject is a book.
All scales are books.
Conclusions:
I. No teacher is...
Statements: All rollers are coasters.
Some swings are rollers.
All bridges are swings.
. Conclusions: I. All coasters being swing...
Statements:
N < J; S = M; J ≥ S; P > M
Conclusions:
I. M ≤ J
II. S < P
III. N > S
Statements:
Only Market are Share.
Some Markets are Stocks.
Only a few Fund is Stock.
Conclusions:
I. At least ...
In the question three statements are given, followed by three conclusions, I, II and III. You have to consider the statements to be true even if it see...
Statements : Some cities are villages.
No village is a town.
All towns are countries.
Conclusions:I. Some towns being cities is a ...
Statements: All AC are Fans.
All Fans are Coolers.
Conclusions:I. All AC are Coolers.
II. Some Fans are AC.
III. No AC is...
Statement:
All N are M
Only M is D.
Conclusion:
I. Some N...
Statements:All papers are pencils.
No pencil is an eraser.
Conclusions:I. No paper is a pencil.
II. No paper is an eraser.
...