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Draw an ERD for the following situation. (State any assumptions you believe you have to make in order to develop a complete diagram.) Also, draw a data model for this situation using the tool you have been told to use in your course: The A M. Honka School of Business operates international business
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- Problem List with Expected Results Problem 1 For all departments, display department number and the sum of all salaries for each department. Name the derived column SUM_SALARY. Result WORKDEPT SUM_SALARY A00 B01 C01 D11 D21 E01 E11 E21 128500.00 41250.00 90470.00 222100.00 150920.00 40175.00 104990.00 95310.00arrow_forwardCreate a data model designarrow_forwardSQL Helparrow_forward
- When building a data model, why is it sometimes preferable to not include a certain piece of information?arrow_forwardPLEASE MAKE THE CORRECT ERD AND THEN CONVERT IT INTO RELATIONAL MODEL BY KEEPING ALL RULES OF IT IN MIND A hardware store sells several home workshop products to the public (such as power saws and sanders). Each product has several different manufacturers who manufacture it, and prices are different for products made by different manufacturers. Product has product no, product name, product details while manufacturers are assigned unique manufacturer number, name, address and phone numbers. Each time one or more products are sold to a customer, an invoice is created which lists the date, items purchased and their prices, and then the total purchase and tax amounts. Consider the above scenario you are required to create ERD for the above scenario first then covert the ERD into Relational Model.arrow_forwardConsider the tables given below and write the relational Algebra for the following tasks Table Name: Products ProductID ProductName Unit Price SupplierlD 1 Chais 10 boxes x 20 bags 18 1 Chang 24 - 12 oz bottles 19 1 3. Aniseed Syrup 12 - 550 ml bottles 10 1 4 ChefAnton's Cajun Seasoning 48 - 6 oz jars 22 Table Name: Suppliers SupplierID SupplierName ContactName Address City 1 Exotic Liquid Charlotte 49 Gilbert St. Londona Сооper New Orleans Cajun Shelley Burke P.O. Box 78934 New Delights Orleans Grandma Kelly's Regina Murphy 707 Oxford Rd. Ann Arbor Homestead 4 Tokyo Traders Yoshi Nagase 9-8 Sekimai Tokyo Musashino-shi A. Write the Relational algebra for the following questions. i. Find all the information of products whose price is from 15 to 25 inclusively. ii. Find the lowest price of products for each supplier ID. iii. Find ID, name and address of suppliers whose city is Tokyo. B. Convert the following SQL statements to Relational Algebra expressions: i. Select * From Products…arrow_forward
- How often are the most common types of mistakes made when data modeling?arrow_forwardComputer Science Create a SQL Code for the following ER diagram/Schema. choose any data type you think is appropriate for each of the attributes (int, numeric, varchar, etc.). Make sure that your SQL code includes all the constrains depicted in the schema! User Follows Follows u id follower id u id username u id birthyear User username birthyear Event Participates Participates u id e id e id topic day e id month day Event month topic (a) (b)arrow_forwardWhen should you use classification over regression?arrow_forward
- What is the difference between creating a data model from scratch and using one that has already been created?arrow_forwardWant in detailarrow_forwardThe IAAA is a new technical professional organization that publishes scientific papers through its periodic conferences. You are asked to design the data modeling for this center based on the following requirements: - A conference has an id, a title, a start date, an end date - Each conference is organized by exactly one organization. - An organization has an id, name, and address. The address consists of country, cily, and P. O. Box number. - An organization can organize one or more conference(s). - Each conference can include one or more paper(s). - Each paper belongs to exactly one conference. - A paper has an id, a tle, and a number of pages, and one or more subject(s). - Each paper is written by one or more author(s). - An avthor has an id, a first name, a middle name, a last name, an email, and a phone umber. - Each author can write one or more paper(s). - An author should work to exactly one organization. An organization consists of one or more author(s). Propose an…arrow_forward
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