Concept explainers
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
comment may be recorded with any feedback the school received from the graduate When a school official knows that he or she will be meeting or talking to a graduate, a report is produced showing the latest information about that graduate and the information learned during the past two years of comments from that graduate.
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Chapter 2 Solutions
MODERN DATABASE MGMT.(PEARSON CHANNEL)
- How do you represent one-to-many and many-to-many relationships in a data model?arrow_forwardObserve the table ENROLLMENT: ENROLLMENT TTE StudentID StudentName MajorID MajorName 111 Joe English 222 Bob History 333 Lisa H History Which of the following actions in the table ENROLLMENT will be affected by a modification anomaly (with its current 3 records)? None of the answers O Changing the name of Joe to Joseph O Changing the name of Lisa to Lizzy O Changing the name of Bob to Robert O Changing the name of English to English Literaturearrow_forwardWhen building a data model, why is it sometimes preferable to not include a certain piece of information?arrow_forward
- Exactly how many distinct pieces of data are considered before a conclusion is made?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_forwardHow often are the most common types of mistakes made when data modeling?arrow_forward
- Write the SQL statements to create all of the necessary tables to represent the above diagram, representing as many constraints as possible. Note: you do not need to worry about specifying types for the fields, but you do need to provide suitable foreign key option(s). When playing a game, the home team name should be stored in attribute htname and the away team name should be stored in atname.arrow_forwardCreate an ER model to represent the data used by the library.The library provides books to borrowers. Each book is described by title, edition, and year of publication, and is uniquely identified using the ISBN. Each borrower is described by his or her name and address and is uniquely identified using a borrower number. The library provides one or more copies of each book and each copy is uniquely identified using a copy number, status indicating if the book is available for loan, and the allowable loan period for a given copy. A borrower may loan one or many books, and the date each book is loaned out and is returned is recorded. Loan number uniquely identifies each book loan.arrow_forwardFind the minimum number of tables required to represent the following given ER diagram in relational model. b_city (b_name Ac_no Balance Assets Account branch Account Branch Depositor Loan branch Customer Borrower Loan c_city C_street Lno Amt C_name IDarrow_forward
- What is the difference between creating a data model from scratch and using one that has already been created?arrow_forwarda: Draw relational model b: Normalize upto 3NFarrow_forwardThe production manager at PVFC is concerned about support for purchased parts in products owned by customers. A simple analysis he wants done is to determine for each customer how many vendors are in the same state as that customer. Develop a list of all the PVFC customers by name with the number of vendors in the same state as that customer. (Label this computed result NumVendors.)arrow_forward
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