implications for management

What are the implications for management of each of the following trends: Reduction in cost of hardware with time Reduction in size of hardware with time Increase in power of hardware with time

Create a relational algebra expression for each of the seven queries

The following tables form part of a database held in a relational DBMS: Hotel (hotelNo, hotelName, city) Room (roomNo, hotelNo, type, price) Booking (hotelNo, guestNo, dateFrom, dateTo, roomNo) Guest (guestNo, guestName, guestAddress) where Hotel contains hotel details and hotelNo is the primary key; Room contains room details for each hotel and (roomNo, hotelNo) forms the primary key; Booking contains details of bookings and (hotelNo, guestNo, dateFrom) forms the primary key; Guest contains guest details and guestNo is the primary key. Generate the relational algebra expressions for the following queries: (a) List all hotels. (b) List all single rooms with a price below $20... click for more

NORMALISATION

Transform the following entities into 3NF entities. Draw the original and final data models, and state any reasonable assumptions. AIRCRAFT (AIRCRAFT ID NUMBER(primary key), AIRCRAFT CODE, AIRCRAFT DESCRIPTION, NUMBER OF SEATS) FLIGHT (FLIGHT NUMBER(primary key), DEAPRTURE CITY, 1{ARRIVAL CITY} n, MEAL CODE, 1{FLIGHT DATE, CURRENT SEAT PRICE}m ) PASSENGER (PASSENGER NUMBER(primary key), PASSENGER NAME, FREQUENT FLYER NUMBER, 1{FLIGHT NUMBER, SEAT NUMBER, QUOTED SEAT PRICE, AMOUNT PAID, BALANCE DUE} )

system design

*** Complete a Request for System Services form, which triggers the preliminary investigation phase. *** Complete a Problem Statement Matrix documenting the problems, opportunities, or directives of the project. *** Prepare and understand the structure and content of the Project Feasibility Assessment Report

Writing Java program from scratch

Program reads info about students and their scores from a file and output the name of each student w/all his/her scores and the total score, plus the average score of the class, and the name and total score of the students with the highest and lowest total score. 4 files are provided: SavitchIn.java - contains simple input library FileIOHelper.class - contains a class for simple file input Sutdent.class - class for student records info.txt - sample input file Program performs following actions: 1.Ask the user to enter the name of a file containing information about student scores and input the file name 2.Input the student info from the file and store it in an appropriate array of Stud... click for more