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Customers SSNO PK name addr phone 1..1 0..* PK Bookings row seat PK 0..* 1..1 Flights number PK day PK aircraft Figure 4.43: A UML diagram analogous to the E/R diagram of Fig. 4.29 4.8.5 Exercises for Section 4.8 Exercise 4.8.1: Convert the UML diagram of Fig. 4.43 to relations.

Customers SSNO PK name addr phone 1..1 0..* PK Bookings row seat PK 0..* 1..1 Flights number PK day PK aircraft Figure 4.43: A UML diagram analogous to the E/R diagram of Fig. 4.29 4.8.5 Exercises for Section 4.8 Exercise 4.8.1: Convert the UML diagram of Fig. 4.43 to relations.

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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### Transcription: --- **Figure 4.43: A UML diagram analogous to the E/R diagram of Fig. 4.29** This diagram illustrates a UML (Unified Modeling Language) representation that is comparable to an E/R (Entity-Relationship) diagram. It depicts the relationships among three entities: Customers, Bookings, and Flights. Here is a detailed breakdown: - **Customers** - Attributes: - SSNo (Primary Key, PK) - name - addr - phone - Relationship: Has a one-to-one or one-to-many (1..1) relationship with Bookings. - **Bookings** - Attributes: - row (Part of Primary Key, PK) - seat (Part of Primary Key, PK) - Relationships: - 0 or many (0..*) relationship with Customers. - 0 or many (0..*) relationship with Flights. - **Flights** - Attributes: - number (Primary Key, PK) - day (Primary Key, PK) - aircraft - Relationship: Has a one-to-one or one-to-many (1..1) relationship with Bookings. **4.8.5 Exercises for Section 4.8** - **Exercise 4.8.1**: Convert the UML diagram of Fig. 4.43 to relations. --- This UML diagram is employed for modeling databases and demonstrates how different entities are related to each other through various cardinalities (1..1, 0..*, etc.).
Transcribed Image Text:### Transcription: --- **Figure 4.43: A UML diagram analogous to the E/R diagram of Fig. 4.29** This diagram illustrates a UML (Unified Modeling Language) representation that is comparable to an E/R (Entity-Relationship) diagram. It depicts the relationships among three entities: Customers, Bookings, and Flights. Here is a detailed breakdown: - **Customers** - Attributes: - SSNo (Primary Key, PK) - name - addr - phone - Relationship: Has a one-to-one or one-to-many (1..1) relationship with Bookings. - **Bookings** - Attributes: - row (Part of Primary Key, PK) - seat (Part of Primary Key, PK) - Relationships: - 0 or many (0..*) relationship with Customers. - 0 or many (0..*) relationship with Flights. - **Flights** - Attributes: - number (Primary Key, PK) - day (Primary Key, PK) - aircraft - Relationship: Has a one-to-one or one-to-many (1..1) relationship with Bookings. **4.8.5 Exercises for Section 4.8** - **Exercise 4.8.1**: Convert the UML diagram of Fig. 4.43 to relations. --- This UML diagram is employed for modeling databases and demonstrates how different entities are related to each other through various cardinalities (1..1, 0..*, etc.).
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