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Question: Create an Entity-Relationship Diagram representing the logical data model for the following scenario. It should include all entities, attributes, relationships and keys. Below your ERD, LIST ANY PATTERNS YOU USED IN CREATING THE ERD.
Scenario:
A cooking club organizes several dinners for its members. The purpose of the club is to allow several members to get together and prepare a dinner for the other members. The club president maintains a database that plans each meal and tracks which members attends each dinner, and also keeps track of which members creates each dinner.
Each dinner serves many members and any member is allowed to attend. Each dinner has an invitation. This invitation is mailed to each member. The invitation includes the date of the dinner and location.
Each dinner is based on a single entrée and a single dessert. This entrée and dessert can be used again for other dinners.
Prepare an Entity-Relationship Diagram show the logical data model for the given scenario.
To apply and consolidate skills acquired in the requirement and analysis disciplines through analysis of a simple case study, and to express the results through the relevant UML diagrams. ITC203
Company's databases do not give them with information required for market planning, lead generation, and account management. What does author say is root cause of this problem?
You subsequently realize that updates to these relations are frequent. Because indexes incur a high overhead, can you think of a way to improve performance on these queries without using indexes?
Write a SELECT statement which returns three columns: VendorName, InvoiceCount, and InvoiceSum. InvoiceCount is the count of the number of invoices, and InvoiceSum is the sum of the InvoiceTotal column.
Write a join query that for every order placed on September 5, 1998, (use '05-SEP-1998') will list the order number and order date along with the customer number, last name, and first name of the customer who placed the order.
What is the business implications that can be drawn from the process of building and comparing these models, and has this practice helped resolve the business issue? Why or why not?
In order to move forward, the local university will need to develop a data model that will retain student records and perform various data extract transform and load (ETL) processes.
Create a state transition diagram that describes typical student states and how they change based on specific actions and events.
Compute the activity rates (i.e., cost per unit of activity) for the activity cost pools. Round off all calculations to the nearest whole cent.
Suppose a database has tables given below. Write the names and e-mail addresses for all customers who have had stove repair which cost more than $50.
A database at a college is required to support the following requirements. Complete the information-level design for this set of requirements. Determine any constraints you need that are not stated in the problem.
To identify the number of employees at the New Book Sales Corporation, you view the records in the Sales Department table.
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