Question: Consider the schema for a flight schedule database that keeps track of carriers ( such as British Air), Airports (such as JFK Airport), and

Consider the schema for a flight schedule database that keeps track of carriers ( such as British Air),

Consider the schema for a flight schedule database that keeps track of carriers ( such as British Air), Airports (such as JFK Airport), and flights schedule (such as Flight 124 from Atlanta to London and its carrier is British Air). Airport (AID, AName, ACity,ACountry) Carrier(CID, CName, CCity, CCountry) Flight(FromAirport, ToAirport, Date, CID) Draw the initial query tree that corresponds to the following SQL query and then show how the query tree is optimized using heuristics: Select F.AName as FName, T.AName as TName, CName From Airport as F, Airport as T, Flight, Carrier Where F.AID=Flight.FromAirport and T.AID=Flight. ToAirport and Flight.CID=Carrier.CID and Flight.Date='1/1/2015' You must show all the optimization steps and comment on each step.

Step by Step Solution

★★★★★

3.46 Rating (146 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

To optimize the given SQL query well go through several steps Each step will involve applying ... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Databases Questions!

Let A1, A2, Ag be independent events so that P(A)=q, 0

Read the case study "Southwest Airlines," found in Part 2 of your textbook. Review the "Guide to Case Analysis" found on pp. CA1 - CA11 of your textbook. (This guide follows the last case in the...

The EU has made changes in airline regulation that dramatically affect major European carriers such as British International Air (BIA, KLM, Air France, Alitalia, and Swiss International Air. With...

This week we are being introduced to the main concept of accounting. To start the discussion, please select from one of the following questions. I will add more questions throughout the week. 1- Why...

Using the Porters 5 competitive forces model answer these questions: 1. How did Porter Airlines take advantage of a transitory business opportunity in an otherwise difficult market to mitigate...

Using Porter's five generic competitive strategies model, answer this question: What are the critical forces that Porter airlines is facing and how are they mitigated? PORTER AIRLINES-.31 Since its...

What are the answers for thise financial ratio analysis for JetBlue case, acording to the following: 1) Current ratio(Liquidity) 2) Total debt 3) Debt-equity 3) Inventory turnover 4) Receivables...

Read the section on Results of Operations. Find 3 things that tell you something important regarding the profitability of the company this year as compared to last year. Use bullet points to list and...

Find 3 things that tell you something important regarding the profitability of the company this year as compared to last year. Use bullet points to list and explain each item. UNITED STATES...

Managing Scope Changes Case Study Scope changes on a project can occur regardless of how well the project is planned or executed. Scope changes can be the result of something that was omitted during...

Top managers of Best Video are alarmed by their operating losses. They are considering dropping the DVD product line. Company accountants have prepared the following analysis to help make this...

Below is a list of assets belonging to Wells (Pty) Ltd.s fixed asset register for the year ended 31 December 2019. ASSET ACQUISITION DATE COST USEFUL LIFE Land 01 May 2010 1,000,000 Building 1 01...

Escriba un an lisis de gastos utilizando los siguientes datos de compras en la Tabla I:Genere una gr fica de gastos por tipo de mercanc aGenere una gr fica de gastos por suplidorGenere una gr fica de...

The table below gives values of a twice- differentiable function f and its first derivative f' for selected values of x. Let g be the function defined by g (x) = f (2x x). - -3 3 4 f (x) 5 -1 2 7 f'...

(a) Prove algebraically that () - () - ) () (":") ("") 3. n 2 n - +...+ 2. 3 2 2 2 Hint : you can use that () + () = (). (b) Use a combinatorial argument to show that () -() )-- (") (":") (":")...

Partnerships report qualified business income (QBI) of Schedule K-1 and must also: a. Reduce ordinary income on page 1, Form 1065 by 20% b. Calculate the QBI deduction for each partner on their...

What is used to gain information about the market, the competition, and the business environment and to gain a greater understanding of the problem?Multiple choice question.formal researchsituation...

Discuss the characteristics of relations that make them different from ordinary tables and files.

Describe the MapReduce join procedures for Sort-Merge join, Partition Join, N-way Map-side join, and Simple N-way join.

Explain what alternative choices exist for accessing a file based on multiple search keys.

The following data were collected during a study of consumer buying patterns. a. Plot the data as a scatter plot. b. Obtain a linear regression line for the data. (You may use Excels =s lope(Range Y,...

Two independent set of forecasts based on judgment and experience have been prepared each month for tire past 10 months. The forecasts and actual demand are as follows: a. Calculate tire MSE, MAD,...

A farming cooperative s manager wants to forecast quarter grain shipments for each quarter of next year (Year 6), based on the data shown below (quantities are in metric tonnes): a. Determine...