subject

Create an ERD using Lucid Chart for the following description. Be sure to include all necessary entities, attributes, and correct cardinality in relationships between entities. Don’t forget foreign keys and any specializations. A local library needs your help designing a database to keep track of books and the customers that check the books out. Each book has a unique ISBN, as well as a title and year that the library would like to track. The library keeps track of each customer name and email address. In addition, the library keeps track of book publishers and authors, and the name and address of each. The library also tracks the two types of publishers: academic and fiction. If a publisher is academic, they cannot be fiction and vice versa.
The library adds a customer to the database after they check out a book, and they can check out multiple books at a time. A book can be checked out by multiple customers but might never have been checked out. When a book is added to the database, its author and publisher are added as well. A book must have at least one author and if an author is in the database, he or she must be associated with a book. Each book may be written by multiple authors and each author may have written many books. A single publisher may have published many books, but each book has only one publisher. If a publisher is in the database, they must be associated with a book.

ansver
Answers: 2

Another question on Computers and Technology

question
Computers and Technology, 22.06.2019 11:00
The isometric projection camera technique provides an illusion of perspective by using things like parallax scrolling to create the illusion of 3d in a 2d game
Answers: 3
question
Computers and Technology, 22.06.2019 23:30
Creating "smart interfaces" in all sectors of industry, government, and the public arena is one of the fastest growing hct areas. these interfaces model, interpret, and analyze such human characteristics as speech, gesture, and vision. the field of biometrics, in which humans authenticate themselves to machines, is an area of considerable interest to hct practitioners. fingerprint scans are one of the most frequently used biometric options, and this article, biometric student identification: practical solutions for accountability & security in schools, makes a case for the implementation of fingerprint scans in schools. critique the article, and answer the following questions: according to the author, what are the main benefits of adopting fingerprint scans in schools for student identification? according to the author, what are the main drawbacks of adopting fingerprint scans in schools for student identification? do you agree with the author's assessment of the pl
Answers: 2
question
Computers and Technology, 23.06.2019 01:00
Petrică, tânăr licean în clasa a ix-a, a primit în dar de la părinţii săi un cont bancar pentru micile sale cheltuieli curente. el este pasionat de internet banking şi îşi verifică cu grijă toate tranzacţiile efectuate. pentru creşterea securităţii tranzacţiilor online, banca îi furnizează lui petrică un număr pe care el va trebui să îl modifice, obţinând un număr tan – număr de autentificare a tranzacţiei (transaction authentication number). regula de obţinere a numărului tan este următoarea: se formează cel mai mic număr par din toate cifrele numărului furnizat de bancă. cerinţă cunoscând numărul n furnizat de bancă, să se determine numărul tan obţinut de petrică. date de intrare fişierul tan.in conţine pe prima linie numărul natural n cu semnificaţia din enunţ. date de ieşire fişierul de ieşire tan.out va conţine o singură linie pe care va fi scris numărul tan cerut. restricţii • 0 < n < 18*1018 • n are cel puţin o cifră pară • numărul tan obţinut nu poate conţine zerouri nesemnificative
Answers: 2
question
Computers and Technology, 23.06.2019 15:00
What is the total resistance in a circuit that contains three 60 ohm resistors connected in a series? a. 20 ohms b. 120 ohms c. 60 ohms d. 180 ohms
Answers: 2
You know the right answer?
Create an ERD using Lucid Chart for the following description. Be sure to include all necessary enti...
Questions
Questions on the website: 13722359