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Question 1: Draw an ERD for the following problem with attributes, primary keys, cardinalities and participation constraints and specialization, if appropriate. An information studies student wants to keep track of the following information. A publishers publishes two kinds of publications: books and journals. Any one publisher publishes at least one book and/or at least one journal. Each book can be written by one or more authors and one author can write one or more books. Each book and journal is characterized by one or more indexed keywords, which are represented by a keyword number and keyword. Not every keyword is used by the journals, however. Both books and journals have a unique number (such as ISBN# for a book and ISSN# for a journal), title and a publisher. For books, the student tracks the published year, all author information and their institutions. For journals, the student keeps the starting year first published, the number of issues to be published per year and the category of the journal (such as academic, newsletter, trade). Each publisher has name, address and phone. Each author has an ID number, name, address, phone, author's affiliated institution and the address of the institution. An author may be affiliated with more than one institution. The student would like to keep only authors who are participating in writing at least one book and institutions that have such authors.
As an external consultant, you have been hired by Overstock.com to evaluate the effectiveness of the processes they undertook in implementing its ERP system and to present your evaluation in report format to the CEO Patrick Byrne
Describe the database and describe the four characteristics of the database? Explain the Relational Database and generate a relational database for five employees.
Now suppose that certain courses can be taught by a team of professors jointly, but it is possible that no one professor in a team can teach the course. Model this situation, introducing additional entity sets and relationship sets if necessary.
You may need to rerun the schema, especially when you have been experimenting with your solutions and may have corrupted the database unintentionally. If you suspect that there might be such problems, rerun the schema.
Explain the concept of physical data independence and its importance in database systems, List four significant differences between a file-processing system and a DBMS.
Databases are powerful tools for storing, managing, manipulating, and accessing data. Most information systems in use today make use of some form of database. In this lesson you will learn about the Access user interface (UI), how to design and ..
From the JD, the set of relation schemes SP, PJ, and JS is a lossless-join decomposition of SPJ. Construct an instance of SPJ to illustrate that no two of these schemes su?ce.
what would you expect to happen to the costs of cakes and what would be the overall margin on the order?
describe seperation between users and database administrators
Draw the corresponding GRD, exhibiting all the primary keys and foreign keys. For simplicity, no other attributes nor multiplicity constraints are required.
Write the SQL code to delete the row for William Smithfield and write the SQL code that will save the changes
What is the note about Loretta Swit's character in MASH and Who were the two leading men who played the leading role in Bewitched
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