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Sname Owner SHIP_MOVEMENT HISTORY Prame N SHIP HOME PORT PORT Latitude (0) (0) Time stamp Longitude SHIP AT PORT TYPE N (1,1) IN ON Date Time 1 Type Tonnage SHIP_TYPE Start date PORT VISIT End_date Name Hull STATE/COUNTRY Name SEA/OCEAN/LAKE Continent

Sname Owner SHIP_MOVEMENT HISTORY Prame N SHIP HOME PORT PORT Latitude (0) (0) Time stamp Longitude SHIP AT PORT TYPE N (1,1) IN ON Date Time 1 Type Tonnage SHIP_TYPE Start date PORT VISIT End_date Name Hull STATE/COUNTRY Name SEA/OCEAN/LAKE Continent

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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How do I convert this into an sql schema??

The image presents an Entity-Relationship (ER) Diagram illustrating the relationships and attributes involved in a ship movement tracking system. This system is designed to record and manage data related to ships, their types, movements, ports, and related geographical information. ### ER Diagram Explanation: 1. **SHIP_MOVEMENT**: - Attributes: `Timestamp`, `Longitude`, `Latitude`. - Linked to `HISTORY` through an N:1 relationship, indicating multiple movements can be associated with one history event. 2. **HISTORY**: - Connected to `SHIP` with an N:1 relationship, showing multiple history records for one ship. 3. **SHIP**: - Attributes: `Sname` (Ship Name), `Owner`. - Linked to `SHIP_TYPE` by an N:1 relationship, indicating a ship has one type. 4. **SHIP_TYPE**: - Attributes: `Type`, `Tonnage`, `Hull`. 5. **HOME_PORT**: - Connects with `PORT` using an N:1 relationship, meaning each ship has one home port. 6. **SHIP_AT_PORT**: - Attributes under `PORT_VISIT`: `Start_date`, `End_date`. - Relationship (0:*) with `PORT` indicates a ship may visit multiple ports or none. 7. **PORT**: - Attributes: `Pname` (Port Name). - Linked to `STATE/COUNTRY` with an N:1 relationship and to `SEA/OCEAN/LAKE` with an N:1 relationship. 8. **STATE/COUNTRY**: - Attributes: `Name`, `Continent`. - Each port is located within a state or country. 9. **SEA/OCEAN/LAKE**: - Attributes: `Name`. - Ports are associated with specific bodies of water. This diagram provides a structured way of understanding how various entities within a ship tracking system are related and what key data attributes are recorded for each entity.
Transcribed Image Text:The image presents an Entity-Relationship (ER) Diagram illustrating the relationships and attributes involved in a ship movement tracking system. This system is designed to record and manage data related to ships, their types, movements, ports, and related geographical information. ### ER Diagram Explanation: 1. **SHIP_MOVEMENT**: - Attributes: `Timestamp`, `Longitude`, `Latitude`. - Linked to `HISTORY` through an N:1 relationship, indicating multiple movements can be associated with one history event. 2. **HISTORY**: - Connected to `SHIP` with an N:1 relationship, showing multiple history records for one ship. 3. **SHIP**: - Attributes: `Sname` (Ship Name), `Owner`. - Linked to `SHIP_TYPE` by an N:1 relationship, indicating a ship has one type. 4. **SHIP_TYPE**: - Attributes: `Type`, `Tonnage`, `Hull`. 5. **HOME_PORT**: - Connects with `PORT` using an N:1 relationship, meaning each ship has one home port. 6. **SHIP_AT_PORT**: - Attributes under `PORT_VISIT`: `Start_date`, `End_date`. - Relationship (0:*) with `PORT` indicates a ship may visit multiple ports or none. 7. **PORT**: - Attributes: `Pname` (Port Name). - Linked to `STATE/COUNTRY` with an N:1 relationship and to `SEA/OCEAN/LAKE` with an N:1 relationship. 8. **STATE/COUNTRY**: - Attributes: `Name`, `Continent`. - Each port is located within a state or country. 9. **SEA/OCEAN/LAKE**: - Attributes: `Name`. - Ports are associated with specific bodies of water. This diagram provides a structured way of understanding how various entities within a ship tracking system are related and what key data attributes are recorded for each entity.
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