A business wants to design a database for its daily operations. The business rules are given below. Create an ER diagram with necessary attributes that reflect the given business rules. You might use any style for the ER diagram. If it is applicable, include the cardinality in the diagram and use the diagram to identify weak entities and weak relationships. Business Rules: • A store may place many orders. • An order must be placed by a store

A business wants to design a database for its daily operations. The business rules are given below. Create an ER diagram with necessary attributes that reflect the given business rules. You might use any style for the ER diagram. If it is applicable, include the cardinality in the diagram and use the diagram to identify weak entities and weak relationships. Business Rules: • A store may place many orders. • An order must be placed by a store

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

See similar textbooks

Similar questions

I have this system, ERD (Entity-Relationship Diagram) Explanation: The ERD is a high-level representation of the data relationships in the ConfPlus Conference Management System. It shows the main entities, their attributes, and the relationships between them. Entities: User: Represents a user in the system, including authors, reviewers, and organizers. Attributes include UserID, Name, Email, Password, Affiliation, and Role. Paper: Represents an academic paper submitted to the conference. Attributes include PaperID, Title, Abstract, PDF, and SubmissionDate. Authorship: Represents the relationship between a User (author) and a Paper. Attributes include AuthorshipID, UserID, PaperID, and IsPresenter (to indicate if the author is the presenter of the paper). Review: Represents a review assigned to a paper by a User (reviewer). Attributes include ReviewID, UserID, PaperID, OverallEvaluation, Contribution, Strengths, Weaknesses, and ReviewDate. Conference: Represents the conference…
Q2- What is a composite entity, and when is it used?
This diagram shows the entities and entity relationships. The diagram is used to model data after normalization steps are completed. What is the diagram called? ORDER orderid (PK) orderDate customerNo (FK) 1..* makes 1..1 has Use-case diagram Pert/CPM chart ER Model Flowchart 1..1 1..* ORDER DETAIL orderid orderitemNo productNo (FK) qty CUSTOMER customerNo (PK) name address contact No 1..1 has ► 1..* PRODUCT productNo (PK) prodtype description sku price qtyonHand
Design an entity–relationship diagram for this database. Identify primary keys and relationship cardinalities using(min:max)notation. If you make any assumptions, please state them clearly.
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…
1. All columns in a relation instance must have distinct data values. True False 2. Degree of a relationship set expresses the number of entities to which another entity can be associated via the relationship set, while cardinality of a relationship set refers to the number of entity sets that participate in the relationship set. True False 3. A database has one physical schema, but many conceptual (logical) schemas and external schemas (views). True False
The entity relationship diagram below models the components of a database belonging to TrueHealth, a network of medical centers. The database allows TrueHealth to keep track of doctors at each practice and their patients. Patient PK Pat ID Consultation Doctor PK,FK1 Doc_ID PK Doc ID 1..1 0.. 1..1 Pat_Name PK, FK2 Pat ID Doc_Name Pat Age Con_Date Doc_EmployDate Pat_Gender FK Prc_ID 0..* 1..1 Practice PK Prc ID Prc_Name Prc_YearEstablished Prc_Province Write SQL statements for the following: Create all the necessary tables. Name the tables; and all their attributes appropriately. Insert TWO records into each of the tables created to demonstrate that you have created them correctly. List all the TrueHealth practices based in Gauteng. List, in alphabetical order, the names of all patients who had consultations after 01 January 2018. Which practice (by name) has the most recent hire (i.e. doctor with latest employment date)? Which doctor has had the least number of consultations? Give the…
show me a picture of how to Create an ERD diagram using Visio or a related tool with tables, keys, columns, and relationships. Primary and Foreign keys need to be identified in this diagram.
What is the difference between a weak entity and a strong entity that is necessary to have a connection with another entity?
Instructions: Create a dimensional model for a particular business process involving gym membership. A customer can sign up for a membership of say one, three, six or twelve months. I want to make it easy to query to identify current members, members who expired in the last month, members who renewed in the last month, those who are pending expiry etc. If I have a basic model with a fact table representing a gym membership say start_date_key end_date_key membership_attribute_key customer_atrribute_key fee with associated dimension table for date, membership attributes such as length, customer attributes and so forth. On a particular day, the active members are those with a start date before the day and an end date after that day. Those who will expire next month are those where the end date is in a particular date range.
You have been asked to design and implement a database for CTU, which includes 3 entities (tables), as follows: Students Faculty Courses Part 1 Create a Word document that includes the following: Identify at least 3 attributes for each entity, including the following: Student's entity should have an attribute for the program the student is enrolled in. Faculty should have an attribute identifying their rank. Properly identify all of the primary keys (use solid underlines). Create an entity relationship diagram (ERD) from the entities. You may use SmartDraw, Visio, Erwin, or even Word to draw the diagram. Take a screenshot (no need if you use Word), and insert it into the Word document. Part 2 Use Microsoft Access to implement the database that you designed in Part 1, and include the following: Create the Student, Faculty, and Course tables in Access. Add a few instances in each table. Create 2 queries for the following objectives: Find the student names for all students who are in the…
Consider the E-R diagram for a university database as shown in Figure 1. What is NOT true about instructorand student?(a) An instructor can advise more than one students.(b) A student can be advised by more than one instructors.(c) A student may not have an instructor as advisor.(d) none of the above.