Please help me answer the following questions QUESTION 21Given the data in this table, which of the following functional dependencies hold?FoodLogFoodТуреVegetableVegetableEatenFirstNameLastNameAsparagusAsparagusOrangeBroccoliDamianEllie3DamianFordFruit5.RobertFordVegetable3RobertFordO Food -> EatenO FirstName-> FirstNameFirstName, LastName -> EatenO Eaten -> FirstNameO FirstName, LastName, Type -> EatenO Food, Type -> FoodO Food -> TypeO FirstName -> LastNameO Type -> FoodQUESTION 22When identifying functional dependencies, the sequence/ordering of columns in a database table is significant.O TrueO False

Answer question 22 is given below

Answered: QUESTION 22 When identifying functional…

QUESTION 22 When identifying functional dependencies, the sequence/ordering of columns in a database table is significant. O True O False

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Why are certain functional dependencies said to be trivial?
STORY BOOK # Id * Name * Published date o Publisher * Type Find the error in the given ERD written by write O g. Novel name is multivalued attribute Oh. Type attribute must be in AUTHOR side O i. Cardinalities of relationships are not correct AUTHOR # Id * Name * Surname o Age O a. There is a volatile attribute and it must be converted to nonvolatile attribute O b. "Published date" and "Publisher" attributes are violating 3NF O c. Name attribute cannot be used in both entities since it is not allowed to have same name O d. Name of the "STORY BOOK" must be written as "STORY_BOOK" O e. Optionality of relationship in AUTHOR side cannot be mandatory O f. "Surname" attribute can be optional
. Students(stulD, lastName, firstName, major, credits) Faculty (facID, name, deptName, rank) • Classes(classNumber, facID, schedule, room) • Enrolls(stulD, 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 stulD of relation Enrolls that references table Students, and the column classNumber of relation Enrolls that references table Classes. The following query is intended to retrieve the number of all classes taught by John Smith in the CST department. However, this query does not work properly. There are at least two faculty members who share the name, John Smith. Briefly explain and show the corrected SQL query_ why. SELECT classNumber FROM Classes WHERE facID= (SELECT facID FROM Faculty WHERE name='John Smith' AND deptName='CST');
True or False : ___ Multiple Inheritance happens when a class has more than one sub-class. This problem can be observed in Programming Languages as well. ___ Given two relations named A and B, if we q-JOIN A and B, the maximum number of attributes in the result relation could be (the number of attributes of A) times(*) the number of attributes of B). ____ * in an SQL SELECT statement means “all the tuples”. ____ In relational algebra, Cartesian Product (X) can be implemented using the q-JOIN operator. Cartesian Product ISA q-JOIN where q-condition always evaluates to true. ____ SQL is based on Predicate Calculus. A query in SQL always specifies what should be included in the query result.
112. The inclusion dependencies that are preceding are used to represent a. algorithmic constraint b. trivial constraint c. referential integrity constraint d. decomposition constraint
branch(branchhame, branch+citysassets} customer (HD, Customer name, customer street, customer city) loan loan number branch_name, amounty borrower(ID; loan_number account (account_number, branch name, balance)e depositor (HDs account number)- Figure le Consider the bank database in Figure 1, where the primary keys are underlined. Each branch might have many loans or accounts, associated with borrowers or depositors, respectively. Construct the following SQL queries for this relational database. 1. Find the name of each branch that has at least one customer who has an account in the bank and who lives in the "Harrison" city. Make sure each branch name only appears once. 2. Find the ID of each customer who lives on the same street and in the same city as customer "12345". (1) Please use "tuple variables". e (2) Please use "derived relations" or “with". 3. Find the ID of each customer of the bank who has an account but not a loan. 4. Find the total sum of all loan amounts for each branch…
Case Study 2: Consider a database application which maintains the stock (product details) of a Hypermarket. The application performs various operations to help the shop owner to maintain the details about various products, selling in the shop. Following are the operations being performed using the application: Saving the details of any products when purchased from the dealer. Modifying the details of any products when it was purchased by the customer. Removing any expired product details. Displaying various reports based on the dynamic query given. With proper reason and example, describe all the necessary SQL commands will you use in this application.
Inventory Database: Customers(custld, custName, address, phone, creditLimit) Orders (orderNo, orderDate, totalAmount, custID) products (prodNo, prodName, unitPrice) Includes(orderNo, prodNo, orderedQantity). The primary keys are underlined. The referential integrity constraints are as follows: • the column custID of relation Orders that references table Customers, • the columns orderNo of relation Includes that references table orders, and the column prodNo of relation Includes that references table Products. For the Inventory Database in the reference, write the SQL command to display the customer ID and the number of orders for each customer. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). BIUS Paragraph ¶"Q 1. 10pt 30 = 2 CHAG OCZ « † ( Ⓒ IXO Q Ô + бе
Use C# to create Order class as follows: a. Data members: oid, orderDate, promised Date, shipDate, deliveryDate, amount, status. b. Behavioral members: isOnTime() - check if the delvieryDate is ahead of promised Date, timeToDelivery() - get number of days from order to delivery, getLate Fees() - company pays 1% fee to the customer for every day of delay in delivery according to the contract.
1. Develop a data manipulation application with a user-friendly JavaFX GUI for student's database (as shown in the ER diagram below). The user should be able to edit existing data and add new data to the database (obeying referential and entity integrity constraints). Allow the user to edit the database in the following ways: a) Add a new student. b) Edit the existing information for a student. c) Delete an existing student. d) Add a new course registration for a student. Student Registration Course id 1 studentid id name courseid major grade name semester room 2. Upgrade the application in Ql to provide an appropriate JavaFX to allow the user to perfom a query that is defined in a TextArea and the results will be shown in a Tableview. Sample predefined queries are: a) Select all students studying "Software Engineering" major. b) Select students who have excellent grades. c) Select all pass students in ascending order based on their names. d) For all students studying "Computer…
Primary keys and candidate keys may both be assigned to the same attribute.
The Wrecks 'R Us Auto Repair Shoppe has a database to keep track of cars, repair orders, and repair technicians. The database has the following tables: Car(vin, make, model, year) - car vehicle ID #, manufacturer, model, and year; for example: (17234, Toyota, Prius, 2008) or (38953, Chevy, Nova, 1968). --. Technician(techid, name, yearhired) -- technician ID number, name, and year hired. CanFix(techid, make, model) -- table listing the car makes and models that a technician can fix. Order(num, vin, techid, year, month, day) -- repair order #, car ID, technician ID, and date. Write a SQL query that produces a list of the names of all technicians who repaired a Ford car before the year 2002. The list should be sorted in a descending order by technician name and should not contain duplicates.