Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN: 9780133594140
Author: James Kurose, Keith Ross
Publisher: PEARSON
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Consider a Student table containing StudentNum, StudentName, StudentMajor, AdvisorNum, AdvisorName, AdvisorOfficeNum, AdvisorPhone, NumCredits, and Category (freshman, sophomore, and so on). List the functional dependencies that exist, along with the assumptions that would support those dependencies |
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- Assume a candidate key is a main key attribute. Your response?arrow_forwardThink about the foreign-key constraint on the instructor's department name property. Please provide examples of additions and deletions that could go against the foreign-key restriction.arrow_forwardTask #1 – Identification of dependencies We learned about two types of functional dependencies, Partial Dependency and Transitive Dependency, and they are critical clues for the identification of tables. In this task, we will practice how to identify the two types of dependencies, so that we can improve the results to new tables. Below is a list of attributes of a dataset. However, the attributes still have some functional dependencies, which means you can create more tables by separating some field(s). Order_ No Product_ No Product_ Description Product_ UnitPrice Customer_No Customer_ Phone Customer_ Address Order_ Date Shipping_ Address Order_ Qty Which partial dependency does this dataset have? Identify the partial dependency using the format in the example below. Example) Partial Dependencies: (ProjectNum ? Proj_Name) (Emp_Num ? Emp_Name, Job_Class) Then, which transitive dependencies does this dataset have? Identify the transitive dependencies…arrow_forward
- Run the problem using Relational Algebra, below the problem I added the needed table. Use self join find the answer (4) Find the name (fname,lname) of the direct supervisor of “Mary Smith”. (“Mary Smith” is an employee). group: emplyeeemployee = {fname, lname, ssn,superssn, departnumber'Mary', 'Smith',111, 222, 11'Green', 'Marjorie',333, 222, 12'Gren', 'Cheryl',222, 777, 14}arrow_forwardWhat is the link between a relation's main key and the functional dependencies among all of its attributes?arrow_forwardDetermine the functional dependencies that exist in the following table. After determining the functional dependencies, convert this table to an equivalent collection of tables that are in third normal form. ITEM(ITEM_ID, DESCRIPTION, ON_HAND, CATEGORY, LOCAITON, PRICE,(INVOICE_NUM, INVOICE_DATE, CUST_ID, FIRST_NAME, LAST_NAME, QUANTITY, QUOTED_PRICE))arrow_forward
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