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Create an ER diagram for each of the following descriptions:
(a) Each company operates four departments, and each department belongs to one company.
(b) Each department in part (a) employs one or more employees, and each employee works for one department.
(c) Each of the employees in part (b) may or may not have one or more dependants, and each dependant belongs to one employee.
(d) Each employee in part (c) may or may not have an employment history.
(e) Represent all the ER diagrams described in (a), (b), (c), and (d) as a single ER diagram.
creating database structure using SQL
Suitable data that suits your requirement and design and explain the 3- schema architecture for the requirement.
Did the corresponding lines for invoices 1001 and 1008 in table LINE get deleted automatically? Can you explain why?
Create a database with at least eight records added to keep track of your favorite television shows. Each record should have at least five fields of your choice. Submit the following screen captures of your database design and functioning in a w..
ISYS 224 Database Systems - Relational Database Design & Implementation
You are required to develop an ER model to represent the information requirements for a database that Queensland Liquor National online trader system will use as described on last page.
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Imagine you are a senior systems administrator who has recently been given the task to help improve security of your company's IT infrastructure after a series of network security breaches.
Consider the UNIVERSITY database described in Exercise Build the ER schema for this database using a data modeling tool such as ERwin or Rational Rose.
Write a program that keeps an employee database in a random-access file. Implement functions for adding and removing employees. You need not keep employees in sorted order.
Create a form containing labels with each of the questions and a group of radio buttons for each question with the following responses: Always, Usually, Sometimes, Seldom, Never.
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