Consider the ER diagram in work in up to two departments or may not be assigned to any department. Assume that each department must have one and may have up to three phone numbers. Supply (min, max) constraints on this diagram. State clearly any additional assumptions you make. Under what conditions would the relationship HAS_PHONE be redundant in this example? Assume that an employee may

Consider the ER diagram in work in up to two departments or may not be assigned to any department. Assume that each department must have one and may have up to three phone numbers. Supply (min, max) constraints on this diagram. State clearly any additional assumptions you make. Under what conditions would the relationship HAS_PHONE be redundant in this example? Assume that an employee may

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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A company keeps track of its departments, employees and mobile numbers assigned to employees by the department. Draw an ER diagram using the (min,max) notation for structural constraints, given that: An employee has a unique id, name and can have more than one address A department has a unique id, name and one address A mobile is identified by its number An employee must work in one department only A department has a minimum of 4 employees A department can own up to 10 mobiles An employee can be assigned up to 2 mobiles State any assumptions you make.
Hello, I'm attempting to create a scholarship management system where information of a student that earned scholarships can retrieve their current, past and present information on the matter. Please construct an EER diagram and ERD (relational diagram) that has the following information in regards to this goal: Entity: Students Eligible-Scholarship All-Scholarships Past-Scholarship Attributes: Student: StudentID Username Password Email Department Faculty CoursesTaken StudentPerformance CGPA Semester Fall Winter Summer StudentName NameFirst NameLast amount(winter & fall separately), student ID, Student Name etc Scholarship Information ScholarshipEligibleFor ScholarshipID ScholarshipName Amount EarnedScholarship ScholarshipID ScholarshipName Amount Please take a screenshot of your tables/diagrams Subject: MYSQL
Q4)Consider the following activity diagram, and answer each of the following questions in not more than one line. Identify all of the activities in this diagram. Identify all of the object/data nodes in this diagram. Identify all of the actions in this diagram. Identify all of the decision nodes in this diagram. Identify all of the fork nodes in this diagram. Identify all of the join nodes in this diagram. Identify a control flow in this diagram. Identify a data flow in this diagram. Can "Pick Order" and "Create Invoice" occur at the same time? Can "Record Order" and "Ship" occur at the same time?
Read the following scenario and answer the questions given bellow.• A car rental company has its offices in three major cites of the area. Acostumer once registered with the company, can avail its services from anynearby office. Every office keeps record of the vehicles, their drivers andrenting details. Salaries of administrative staff are controlled at a single sitewhile the drivers are paid (according to the services they provide) from their local office. Rates for famous tourism spots are fixed (with a slight difference for different vehicles), while other spots are charged according to the mileage covered. 1. Identify the entities involved in the database designed for thecompany.2. Draw GCS for the system.3. Give details of any of the relations replicated on more than one sites
Create a fully labeled Crow's Foot ERD using a specialization hierarchy where appropriate (use Visio). The ERD must contain all primary keys, foreign keys, and main attributes. Business rules are defined as follows: A large university consists of several schools. Each school is chaired by one employee. An employee may be the dean of one and only one school.
Construct an ER_Diagram for NSU Employees who are identified by a unique id number. NSU has 3 major types of employee (faculty, secretary and OSS) with their specific role. Each faculty has many research areas and they work on monthly salary basis. Secretary also works on monthly salary basis but they have an option for overtime. Security guard salary is calculated by the number of hours they worked in a month. At the end of each month, employees are paid form the NSU account. We are also interested to store the starting date of each employee.
Based on the following Entity-Relationship Diagram with the following requirements: There are Professors (ie users) with the changeable attributes Professor_Name, Field, College, PhD_DateThere are Flubs (ie posts) with the unchangeable attributes Content, Purpose, Moment, Inventor (which is the creating Professor)There are Bounces (ie shares) where a Professor can share another Professor's FlubAdd ID attributes as necessaryContent of Flubs only needs to be a text of fixed lengthProfessors can have/be Colleagues (ie friends/followers)A Flub can get Citations (ie likes) by other Professors--------- Create the Relational Model for the Flubber database based upon your ER Diagram above, meeting all the same requirements. Include all necessary Primary Key and Foreign Key constraints. This should be syntactically correct to test in a MySQL database.
A national bank and an international bank decide to merge. Assume, that both the organizations use almost similar ER diagrams. Prepare the ER diagram for the merged bank. Make, and state, suitable assumptions if any. please don't copy this answer from another chegg's account and any site's (Ex. geeks-for-geeks..) . Please try to be unique.
Create an ER Diagram for the following scenario. Please state any assumptions you have madein your answer.A university offers a Mathematics program. This program can offer any amount ofcourses in a semester. Each course has a roster limit, location and time slot. A studentcan be registered for any number of courses in a semester but to register for a coursethey must have a valid student ID and address. Each course is assigned a singleprofessor. Only on completion of a course, a student receives a final grade for thatcourse.
Hello, Just want to check if the attached Crow's Foot ERD is correct for the following problem: Given the information below, create the fully labeled Crow's Foot ERD using a specialization hierarchy where appropriate (use Visio). The ERD must contain all primary keys, foreign keys, and main attributes. Business rules are defined as follows: A large university consists of several schools. Each school is chaired by one employee. An employee may be the dean of one and only one school.
Develop ERD (Entity Relationship Diagram) for one of the following two scenarios. NOTE: No further details were provided by the professor. The diagram can be drawn by hand also if preferred. Option1: A customer who goes to a grocery shop generates one invoice each time s/he goes to the grocery. Customer data to capture includes ID, FirstName, LastName, City, State, CreditLimit. An invoice should capture the data on InvoiceID, SaleDate, SalesPerson, and Amount. Provide a conceptual ERD for this transaction scenario. Option 2: One sports team consists of many players, and one player can belong to one sports team at a time. Sports team data should have TeamID, TeamName, CoachName, memberNumbers, City, State, owner, TeamValue. Each player can be represented with PID, Name, Address, PhoneNo, Position, weight, height, Value, and Scores. Provide a conceptual ERD to develop a database.
Given the following business scenario, create a Crow’s Foot ERD using a specialization hierarchy if appropriate. Eastern Sales Company keeps information on employees and the departments that they work in. For each department, the department name, internal mail box number, and office phone extension are kept. A department can have many assigned employees, and each employee is assigned to only one department. Employees can be salaried employees, hourly employees, or contract employees. All employees are assigned an employee number. This is kept along with the employee’s name and address. For hourly employees, hourly wage and target weekly work hours are stored (e.g. the company may target 40 hours/week for some, 32 hours/week for others, and 20 hours/week for others). Some salaried employees are salespeople that can earn a commission in addition to their base salary. For all salaried employees, the yearly salary amount is recorded in the system. For salespeople, their…