Question 4 T4.1) Given the following information, for each one of the BOLD words (note there are 3 in each one),specify whether the word will be mapped into an entity, attribute, relationship, or value in thecorresponding database.Ia) The make of my Red vehicle is Chevy. Chevy is an Entity, make is the relationship, vehicle is theattributeb) Instructor Smithy teaches three courses.Teaches is the value, instructor is attribute, smithy is the entitiyWM.

specify whether the word will be mapped into an entity, attribute, relationship, or value in the…

Answered: Question 4 4.1) Given the following…

Database Systems: Design, Implementation, & Management

12th Edition

ISBN:9781305627482

Author:Carlos Coronel, Steven Morris

Publisher:Carlos Coronel, Steven Morris

Chapter2: Data Models

Section: Chapter Questions

Problem 11P

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# Question 2. Please select the correct statement(s) regarding keys in relational models. A. A candidate key is a key (super key) with a minimal set of attributes (cannot remove any attributes from this set, and the remaining one(s) still satisfy the key constraint). B. A candidate key is another term for key (super key) in relational models, and they have exactly the same meaning. C. One of the candidate key(s) is selected to be the primary key, and other candidate keys can be declared as UNIQUE. D. We can select multiple candidate keys to be multiple primary keys for a relation (multiple primary keys, not a primary key with multiple attributes). E. The attribute in a primary key does not accept NULL.
First normal form a) prohibits multi-valued attributes b) prohibits composite attributes c) is part of the definition of relation in the basic relational model d) all of the above
Question: Consider a relation named as BOOK that contains data about the books in a library. BOOK relation was initially created with the attributes BookID (an id that library assigns), ISBN, CopyNr (used to differentiate copies of the same book), Title, PublYear, Author, and AuthorBornYear. Primary key: BookID, CopyNr and Author Candidate key: ISBN, CopyNr and Author Below you see dependencies of attributes: Dependency 1 (D1): ISBN, Title, PublYear, AuthorBornYear were dependent on BookID, CopyNr, and Author Dependency 2 (D2): Title and PublYear were dependent on BookID, CopyNr Dependency 3 (D3): AuthorBornYear was dependent on Author First determine which normal form (1NF, 2NF, 3NF, or BCNF) the above relation is, and why. Then, if necessary, convert the above relation to the highest normal form (BCNF). Write any assumptions that you make Subject: MYSQL
Let us consider the following relational database. Students(stuID, lastName, firstName, major, gpa) Faculty(facID, name, deptName, rank) Classes(classNhmber, facID, schedule, room) Enrolls(stuID, classNumber, grade) The primary keys are underlined. The referential integrity constraints are as follows: The column facID of relation Classes that references table Faculty, The column of stuID of relation Enrolls that references table Students, and The column classNumber of relation Enrolls that references table Classes. The following SQL statement is intended to define the table Students. However, this statement does not work correctly. CREAT TABLE Students( lastName VARCHAR(20), firstName VARCHAR(20), major VARCHAR(40) gpa DECIMAL(3,2), PRIMARY KEY(stuID)); However, this statement does not work correctly. Briefly explain why and list the corrected SQL statement.
The following ERD refers to an borrow system of a library. Member can borrow different books, which were written by different authors and published by different publishers. A writer can be contracted to one or more publishers. Each member can have different borrows with different books to different expiring dates.a)Give two Attributes for each entity. Draw them directly into the ER-diagram. b)Give a primary key for each entity. Draw it directly into the ER-diagram. c)Create the SQL statement for implementing the table for one of the entities of the up standing ERD
a) Referring to the company database, which relations have the same set of attributes for their default superkey and primary key? b) Referring to the company database, which relations have a reasonable candidate key that is not its primary key? C) Referring to the company database, specify an update operation to the department relation that will violate a primary key constraint constraint. D) Referring to the company database, what constraints to the database would be violated if Smith were deleted from the employee relation? Include the relevant relations and attributes in your answer.
For 1 through 4, state whether the statements are True or False (Do not provide any explanation or comment but only an answer of either True or False) A composite attribute is an attribute that is composed of several attributes. A derived attribute is an attribute whose value is calculated and not permanently stored in adatabase. Every table is a relation. Referential integrity constraint is a rule stating that no primary key column can be optional.
Construct an ERD for Leslie’s Auto Sales. Make sure to denote your primary and foreign keys. Note: Crow’s Foot Database Notation is required Question Leslie’s Auto Sales has a relational database with which it maintains data on its salespersons, its customers, and the automobiles it sells. areEach of these three entity types has a unique attribute identifier. The attributes that it stores are as follows: a. Salesperson Number(unique), SalespersoMaken Name, Salesperson Telephone, Hire Date b. Customer Number(unique), Customer Name, Customer Address, Value of Last Purchase c.Vehicle Identification Number (unique), Manufacturer, Model, Year, Sticker Price Leslie’s also wants to keep track of which salesperson sold which car to which customer, including the date of the sale and the negotiated price. Construct an ERD for Leslie’s Auto Sales. Make sure to denote your primary and foreign keys. Crow’s Foot Database Notation is required.Construct an ERD for Leslie’s Auto Sales. Make sure to…
DATABASE SYSTEMS 6.Any relation that is not part of the logical model, but is made visible to a user as a a)Absolute relation b)Natural relation c)Virtual relation d)Linear relation 7.Which of the following query is correct? a)SELECT ename FROM employee WHERE age>30 and WHERE age <40; b)SELECT ename FROM employee WHERE age>30 and age <40; c)None of these d)SELECT ename FROM employee WHERE age>30 and <40; 8.Produces a relation that contains all the rows of R1, or R2, or both R1 and R2, duplicate tuples being eliminated. R1 and R2 must be union-compatible. a)R1 left outer join R2 b)R1 X R2 c)R1 U R2 d)R1 - R2 9.Find the EmpIds of employees with name and city whose city is either RYK or LHR but empid must be greater than 5 a)SELECT empid, name,city FROM emp WHERE city = 'RYK' AND city ='LHR' AND empid >5); b)SELECT empid, name,city FROM emp WHERE city = 'RYK' OR city ='LHR' AND empid >5); c)SELECT empid, name,city FROM emp WHERE city = 'RYK' OR city ='LHR' OR…
1. Consider the following relations:Student (snum: integer, sname: string, major: string, level: string, age: integer)Class (name: string, meets at: string, room: string, fid: integer)Enrolled (snum: integer, cname: string)Faculty (fid: integer, fname: string, deptid: integer)The meaning of these relations is straightforward; for example, Enrolled has onerecord per student-class pair such that the student is enrolled in the class. Level is atwo character code with 4 different values (example: Junior: A Level etc)Write the following queries in SQL. No duplicates should be printed in any of theanswers.i. Find the names of all Juniors (level = A Level) who are enrolled in a classtaught by Prof. Kwizeraii. ii. Find the names of all classes that either meet in room R128 or have five ormore Students enrolled.iii. Find the names of all students who are enrolled in two classes that meet atthe same time.
Topic: Database Design - Entity Relationship Modeling (Please answer the below question in 250 words or more). Thank you! It is known that we should avoid redundant data. Let’s say you have a Product Table with the cost of an item, and an Order table that has information about orders from customers. What would be the benefits to also storing the item's cost in the Order table?
Q3: Define a relation prereq depth(course id, prereq id, depth) where the attribute depth indicates how many levels of intermediate prerequisites there are between the course and the prerequisite. Direct prerequisites have a depth of 0. Note that a prerequisite course may have multiple depths and thus may appear more than once.

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