GATE Exam > GATE Questions > Consider an ER model with four entity set, E1...
Start Learning for Free
Consider an ER model with four entity set, E1(A, B), E2(C, D), E3 (E, F), and E4 (G, H). Relation R1 is following “one to many mapping“ between E1 and E2. Relation R2 is following “many to one“ between E3 and E4. E1 and E4 are linked with a relation R5 following “many to many mapping”. E2 and E4 are related to each other by a one to one relationship which is R4. E1 and E3 are also related to each other by a one to one relationship (R3) but one end is showing total participation.
What is the minimum no of tables required to store the given ER Model ________
Correct answer is '5'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
Consider an ER model with four entity set, E1(A, B), E2(C, D), E3 (E, ...
By applying mapping Constraints, R1 can be merged with E2 with C as candidate key. Due to total participation of E3 in relation R3, (E1, R3, E3) can be merged together with E as candidate key. R4 can be merged with either E2 or E4. So, the final merged tables are
E2R1 (A, C, D)E1R3E3 (A, B, E, F)E4R4(C, G, H) R2 (E, G) R5(A, G)
Now we can merge R2 with E1R3E3, due to one to many relationship constraint. Hence, the required no of tables will be 5.
Most Upvoted Answer
Consider an ER model with four entity set, E1(A, B), E2(C, D), E3 (E, ...
Minimum Number of Tables Required in the ER Model
To store the given ER model, we need to analyze the relationships between the entity sets and determine the minimum number of tables required.
Consider the Relationships
- R1: One to many mapping between E1 and E
- R2: Many to one mapping between E3 and E4
- R3: One to one relationship with total participation between E1 and E3
- R4: One to one relationship between E2 and E4
- R5: Many to many mapping between E1 and E4
Tables Required
1. Table for E1:
- Columns: A, B, E (from R1), and G (from R5)
2. Table for E2:
- Columns: C, D, G (from R4)
3. Table for E3:
- Columns: E, F, H (from R2), and A (from R3)
4. Table for E4:
- Columns: G, H, A (from R5), and C (from R4)
5. Table for the Many to Many Relationship (R5):
- Columns: A, G
This breakdown ensures that all the relationships between the entity sets are properly represented in the tables while minimizing redundancy and ensuring data integrity.
|
Explore Courses for GATE exam
|
|
Similar GATE Doubts
Consider an ER model with four entity set, E1(A, B), E2(C, D), E3 (E, F), and E4 (G, H). Relation R1 is following “one to many mapping“ between E1 and E2. Relation R2 is following “many to one“ between E3 and E4. E1 and E4 are linked with a relation R5 following “many to many mapping”. E2 and E4 are related to each other by a one to one relationship which is R4. E1 and E3 are also related to each other by a one to one relationship (R3) but one end is showing total participation.What is the minimum no of tables required to store the given ER Model ________Correct answer is '5'. Can you explain this answer?
Question Description
Consider an ER model with four entity set, E1(A, B), E2(C, D), E3 (E, F), and E4 (G, H). Relation R1 is following “one to many mapping“ between E1 and E2. Relation R2 is following “many to one“ between E3 and E4. E1 and E4 are linked with a relation R5 following “many to many mapping”. E2 and E4 are related to each other by a one to one relationship which is R4. E1 and E3 are also related to each other by a one to one relationship (R3) but one end is showing total participation.What is the minimum no of tables required to store the given ER Model ________Correct answer is '5'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about Consider an ER model with four entity set, E1(A, B), E2(C, D), E3 (E, F), and E4 (G, H). Relation R1 is following “one to many mapping“ between E1 and E2. Relation R2 is following “many to one“ between E3 and E4. E1 and E4 are linked with a relation R5 following “many to many mapping”. E2 and E4 are related to each other by a one to one relationship which is R4. E1 and E3 are also related to each other by a one to one relationship (R3) but one end is showing total participation.What is the minimum no of tables required to store the given ER Model ________Correct answer is '5'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider an ER model with four entity set, E1(A, B), E2(C, D), E3 (E, F), and E4 (G, H). Relation R1 is following “one to many mapping“ between E1 and E2. Relation R2 is following “many to one“ between E3 and E4. E1 and E4 are linked with a relation R5 following “many to many mapping”. E2 and E4 are related to each other by a one to one relationship which is R4. E1 and E3 are also related to each other by a one to one relationship (R3) but one end is showing total participation.What is the minimum no of tables required to store the given ER Model ________Correct answer is '5'. Can you explain this answer?.
Consider an ER model with four entity set, E1(A, B), E2(C, D), E3 (E, F), and E4 (G, H). Relation R1 is following “one to many mapping“ between E1 and E2. Relation R2 is following “many to one“ between E3 and E4. E1 and E4 are linked with a relation R5 following “many to many mapping”. E2 and E4 are related to each other by a one to one relationship which is R4. E1 and E3 are also related to each other by a one to one relationship (R3) but one end is showing total participation.What is the minimum no of tables required to store the given ER Model ________Correct answer is '5'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about Consider an ER model with four entity set, E1(A, B), E2(C, D), E3 (E, F), and E4 (G, H). Relation R1 is following “one to many mapping“ between E1 and E2. Relation R2 is following “many to one“ between E3 and E4. E1 and E4 are linked with a relation R5 following “many to many mapping”. E2 and E4 are related to each other by a one to one relationship which is R4. E1 and E3 are also related to each other by a one to one relationship (R3) but one end is showing total participation.What is the minimum no of tables required to store the given ER Model ________Correct answer is '5'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider an ER model with four entity set, E1(A, B), E2(C, D), E3 (E, F), and E4 (G, H). Relation R1 is following “one to many mapping“ between E1 and E2. Relation R2 is following “many to one“ between E3 and E4. E1 and E4 are linked with a relation R5 following “many to many mapping”. E2 and E4 are related to each other by a one to one relationship which is R4. E1 and E3 are also related to each other by a one to one relationship (R3) but one end is showing total participation.What is the minimum no of tables required to store the given ER Model ________Correct answer is '5'. Can you explain this answer?.
Solutions for Consider an ER model with four entity set, E1(A, B), E2(C, D), E3 (E, F), and E4 (G, H). Relation R1 is following “one to many mapping“ between E1 and E2. Relation R2 is following “many to one“ between E3 and E4. E1 and E4 are linked with a relation R5 following “many to many mapping”. E2 and E4 are related to each other by a one to one relationship which is R4. E1 and E3 are also related to each other by a one to one relationship (R3) but one end is showing total participation.What is the minimum no of tables required to store the given ER Model ________Correct answer is '5'. Can you explain this answer? in English & in Hindi are available as part of our courses for GATE.
Download more important topics, notes, lectures and mock test series for GATE Exam by signing up for free.
Here you can find the meaning of Consider an ER model with four entity set, E1(A, B), E2(C, D), E3 (E, F), and E4 (G, H). Relation R1 is following “one to many mapping“ between E1 and E2. Relation R2 is following “many to one“ between E3 and E4. E1 and E4 are linked with a relation R5 following “many to many mapping”. E2 and E4 are related to each other by a one to one relationship which is R4. E1 and E3 are also related to each other by a one to one relationship (R3) but one end is showing total participation.What is the minimum no of tables required to store the given ER Model ________Correct answer is '5'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Consider an ER model with four entity set, E1(A, B), E2(C, D), E3 (E, F), and E4 (G, H). Relation R1 is following “one to many mapping“ between E1 and E2. Relation R2 is following “many to one“ between E3 and E4. E1 and E4 are linked with a relation R5 following “many to many mapping”. E2 and E4 are related to each other by a one to one relationship which is R4. E1 and E3 are also related to each other by a one to one relationship (R3) but one end is showing total participation.What is the minimum no of tables required to store the given ER Model ________Correct answer is '5'. Can you explain this answer?, a detailed solution for Consider an ER model with four entity set, E1(A, B), E2(C, D), E3 (E, F), and E4 (G, H). Relation R1 is following “one to many mapping“ between E1 and E2. Relation R2 is following “many to one“ between E3 and E4. E1 and E4 are linked with a relation R5 following “many to many mapping”. E2 and E4 are related to each other by a one to one relationship which is R4. E1 and E3 are also related to each other by a one to one relationship (R3) but one end is showing total participation.What is the minimum no of tables required to store the given ER Model ________Correct answer is '5'. Can you explain this answer? has been provided alongside types of Consider an ER model with four entity set, E1(A, B), E2(C, D), E3 (E, F), and E4 (G, H). Relation R1 is following “one to many mapping“ between E1 and E2. Relation R2 is following “many to one“ between E3 and E4. E1 and E4 are linked with a relation R5 following “many to many mapping”. E2 and E4 are related to each other by a one to one relationship which is R4. E1 and E3 are also related to each other by a one to one relationship (R3) but one end is showing total participation.What is the minimum no of tables required to store the given ER Model ________Correct answer is '5'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Consider an ER model with four entity set, E1(A, B), E2(C, D), E3 (E, F), and E4 (G, H). Relation R1 is following “one to many mapping“ between E1 and E2. Relation R2 is following “many to one“ between E3 and E4. E1 and E4 are linked with a relation R5 following “many to many mapping”. E2 and E4 are related to each other by a one to one relationship which is R4. E1 and E3 are also related to each other by a one to one relationship (R3) but one end is showing total participation.What is the minimum no of tables required to store the given ER Model ________Correct answer is '5'. Can you explain this answer? tests, examples and also practice GATE tests.
|
|
Explore Courses for GATE exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup