4.5 An Example of Patient EER Schema Consider the following information about a patient database: A patient is identified by patient id, and admission date. • A patient must be either an Emergency patient or a resident patient. We must record the checkback date for Emergency patient. Only resident patient is assigned to one room. Room has a unique number, degree, and floor number. • For each room there are a number of beds each of which has a bed number, specification. If a room is deleted, you need not keep track of its beds any longer. Both emergency patient and resident are cared for by a responsible Doctor. Doctor is identified by Doctor number. For each Doctor, the name, several specialty, and years of experience must be recorded. Doctors prescribe medicine for patients. Medicine is identified by trade name that has scientific name and formula. The medicine depends on another medicine to be taking before. • A doctor could prescribe one or more drugs for several patients, and a patient could obtain prescriptions from several doctors. Each prescription has a date and a quantity of medicine. Draw an ER/EER diagram that captures the above information.

4.5 An Example of Patient EER Schema Consider the following information about a patient database: A patient is identified by patient id, and admission date. • A patient must be either an Emergency patient or a resident patient. We must record the checkback date for Emergency patient. Only resident patient is assigned to one room. Room has a unique number, degree, and floor number. • For each room there are a number of beds each of which has a bed number, specification. If a room is deleted, you need not keep track of its beds any longer. Both emergency patient and resident are cared for by a responsible Doctor. Doctor is identified by Doctor number. For each Doctor, the name, several specialty, and years of experience must be recorded. Doctors prescribe medicine for patients. Medicine is identified by trade name that has scientific name and formula. The medicine depends on another medicine to be taking before. • A doctor could prescribe one or more drugs for several patients, and a patient could obtain prescriptions from several doctors. Each prescription has a date and a quantity of medicine. Draw an ER/EER diagram that captures the above information.

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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Transaction Processing

Transaction processing is a computational style generally performed by server computers, which supports interactive applications (apps). Transaction processing is also known as information processing, which divides the work into indivisible and individual operations called transactions. The transaction is a set of tasks; a single task is considered as the minimum processing unit that cannot be divided again.

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Consider the following information about a patient database

Organized collection of structured information, or data, typically stored in a computer system.

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