Which statement is true? OA. For a database conceptual design, an alternative of an E-R diagram is the Use-Case diagram OB. Attributes are properties used to describe relationships OC. A specific entity have a value for each of its relations D.Entities are specific things or objects in the mini-world that are represented in the database.

Which statement is true? OA. For a database conceptual design, an alternative of an E-R diagram is the Use-Case diagram OB. Attributes are properties used to describe relationships OC. A specific entity have a value for each of its relations D.Entities are specific things or objects in the mini-world that are represented in the database.

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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LOGICAL DATABASE DESIGN The above EER-Diagram represents a University Library Membership (see Diagram 5). A member can borrow as many books from the library. Derive relations for logical model from the above EER-Diagram. Please identify any primary key or foreign key in the derive relations (if applicable).
Please written by computer source Part I - Modeling You are building a database for a comic book store customer management system. Given the database specification below, your job is to turn the specification into an ER diagram. Your notation must be consistent with the notation used in our lecture notes. You can use all constructs and notations discussed in our lecture notes and nothing else (i.e.. oven notations used in the textbooks but not in our lectures cannot be used). Your ER diagram should capture all the information and constraints in the specification but, at the same time, be minimal. It means that redundant entities, relationships, attributes and constraints should be avoided. You may use any drawing tool of your choice (for example, Dia, diagrams.net, Lucidchart, etc.) to draw your ER diagram. Hand drawings will not be accepted. Database Specification The database keeps information about comic books, customers, orders, inventory and reviews. First, the database should…
Which of the following is a key part of conceptual design in an entity relationship model? This model resolves the many-to-many relationships to multiple one-to-many relationships. This model adds all of the attributes for each entity. This model converts attributes into columns. This model does not depend on the database management software or the hardware used to implement the model.
1. Create an entity relationship diagram for the conceptual design using UML notation. The diagram can be created by hand or via some modeling tool. 2. Create a data dictionary for the entities, relationships and attributes. Make your best guess for representing the attributes. Schema 3 You have been hired by the Snowbird ski mountain resort to build a database for their data. The resort has ski mountain peaks, chair lifts, trails, stores and restaurants. For each mountain peak, you track the name, the elevation and its latitude and longitude. Each peak name is unique. The names of the mountain peaks are: Mount Superior, Mount Baldy, Twin Peaks and Hidden Peak. For each chair lift, you track a unique name, the vertical rise, the travel time, the number of people per chair (ranging from 2 to 4) , and its closing time. For each trail, you track its unique name, its elevation, its length, and the typical time it takes to complete. Each ski trail is classified by its level of…
Create an ER diagram for the following requirements:You are asked to design a database to store music album information. A simplified set of requirementsare provided below.- A music album has a title, year of release, total running time, one or more artists, and list ofsongs.- Each song has a lead artist and may have a list of additional artists. Each song has a list of otherassociated people such as mixer, mix engineer, keyboards, guitar, etc. Each song has a genre,running time, and lyrics. Each song can be associated with many albums, but needs to beassociated with at least one.- Each person has a first name, last name, and nickname.
Create a database Entity and Relationship Diagram (ERD) for the following application (Submitted An image of the Diagram By using Any Application:The Application idea: It is a mobile application called (Khair) to help people. This assistance is moral, material. This assistance is also provided by good people in our community. Example to understand the Application idea more: For example, a person urgently needs a medical chair or bed and does not have the ability to purchase what he needs. The medical chair or bed is requested through the application, and whoever has what he requests initiates the request through the application’s messages and determines the meeting place. Application models (page): Login included: login registration login included: user name password New registration included: name E-mail Password phone number date National Identification Number Home page included: Request - applicant name - address - send message Messages list form included: list of users Messager…
d Cônceptual design In the refarional model, the database snapshot is also called Select one a Current set of entity b.current set of entity C. Current set of objects d. current set of instances In dagams the nart par
Draw a clear and complete ER diagram
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1. To create the ERD for the SIM system, the Entity - Relationship Diagram, which helps to describe the database for a computer system, go back to the information system DFD you created for Assignment 4 and just label the data flow arrows using the cardinality notation. That will show the relationship between the entities on your ERD. 2. To design sample data tables from the ERD you created in #1, you need to think of the objects that will be part each process. These objects will become the column headers for your table. So for example, the Customers table will have fields like name and address, and their household should have an ID #. Do this for all the objects in your ERD. Carlie asked that the database be a 3NF or Third Normal Form, all that means is that you will have a simple, one field, primary key for each of your data tables. No data repeats in any table and all of the fields in a table are dependent on its primary key. So you should create 6 data tables, one for each of the…
Database Lab (CE 450) ( Task 9) B) Objective: Design the Appropriate Database Schema for ER diagram: 1. Identify the tables for the Database. 2. Identify the columns for the tables. 3. Identify the constraints(PRIMARY KEY,UNIQUE,NOT NULL,FOREIGN KEY ) constraints for the columns. An ER diagram for a BANK database schema BRANCHES BANK_BRANCH BANK Code Name Addr Addr Branch_no АСCTS LOANS Acct_no Balance Loan_no Amount ACCOUNT Туре Туре LOAN M A_C LC (Tname Mname Lname Bdate Ssn Name Age Phones CUSTOMER Addr
Draw the ER diagram based on the following specification. A tutorial school is using a database to manage information about teachers, courses, and students. Each teacher is identified by staff_id, has a name, an email address, and a phone number. Each student is identified by student_id, has a name, an email address, and a registration date. Each course is identified by course_id, year, and semester. In addition, each course has a name. Each course is associated with multiple lessons. A lesson has a lesson number, a location, a date, a start-time, and an end-time. Lesson numbers are sequentially numbers, starting from 1, generated separately for each course. Each teacher teaches at least one course. Each student takes at least one course. Each course is taught by one teacher. Each course can be taken by many students.