Write the entities , attributes and relationship in this text .Make sure select the correct types of attributes, assign an identifier, and describe the minimum maximum cardinality constraints as well. A piano manufacturer wants to keep track of all the pianos it makes individually. Each piano has an identifying serial number and a manufacturing completion date. Each instrument represents exactly one piano model, all of which have an identification number and a name. In addition, the company wants to maintain information about the designer of the model. An employed designer may not have designed any models yet. Over time, the company often manufactures thousands of pianos of a certain model, and the model design is specified before any single piano exists. The piano manufacturer also employs piano technicians who are responsible for inspecting the instruments before they are shipped to the customers. Each piano is inspected by at least one technician (identified by the employee number). For each separate inspection, the company needs to record its date and a quality evaluation grade.

Write the entities , attributes and relationship in this text .Make sure select the correct types of attributes, assign an identifier, and describe the minimum maximum cardinality constraints as well. A piano manufacturer wants to keep track of all the pianos it makes individually. Each piano has an identifying serial number and a manufacturing completion date. Each instrument represents exactly one piano model, all of which have an identification number and a name. In addition, the company wants to maintain information about the designer of the model. An employed designer may not have designed any models yet. Over time, the company often manufactures thousands of pianos of a certain model, and the model design is specified before any single piano exists. The piano manufacturer also employs piano technicians who are responsible for inspecting the instruments before they are shipped to the customers. Each piano is inspected by at least one technician (identified by the employee number). For each separate inspection, the company needs to record its date and a quality evaluation grade.

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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Theoretical Computer Science

Usually, computer science seems like a practical field that involves studying, building, and working closely with computers. However, a subclass of this discipline also centers on the mathematical factors of the same. This is called theoretical computer science, and its focal point differentiates it from other branches of computer science: the rigorous mathematical approach it takes. This discipline falls under the umbrella of discrete mathematics, which is the study of countable or discontinuous mathematical structures.

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Expert Q&A
Done
Write the entities , attributes and relationship in this
text .Make sure select the correct types of
attributes, assign an identifier, and describe
the minimum maximum cardinality constraints as
well.
A piano manufacturer wants to keep track of all the
pianos it makes individually. Each piano has an
identifying serial number and a
manufacturing completion date. Each instrument
represents exactly one piano model, all of which
have an identification number and a
name. In addition, the company wants to maintain
information about the designer of the model. An
employed designer may not have
designed any models yet. Over time, the company
often manufactures thousands of pianos of a
certain model, and the model design is
specified before any single piano exists. The piano
manufacturer also employs piano technicians who
are responsible for inspecting the
instruments before they are shipped to the
customers. Each piano is inspected by at least one
technician (identified by the employee
number). For each separate inspection, the
company needs to record its date and a quality
evaluation grade.

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