Question: Optimize the following two relational algebra queries (Your marks will depend on how well you present the key ideas of query optimization in your answer).

Optimize the following two relational algebra queries (Your marks will depend on how well you present the key ideas of query optimization in your answer). In addition to this, draw the query trees that correspond to queries before and after your optimisation.

(a) BOOKING.CustomerID,Origin,P rice(BOOKING.F lightNo=F LIGHT .F lightNo (BOOKING.CustomerID=CUST OMER.CustomerID(BOOKING F LIGHT CUST OMER)))

(b) R1.CustomerID(R1.CustomerID=R2.CustomerID((R1.Date6=R2.Date)(R1.Origin=0Canberra0) (R2.Origin=0Canberra0) (R1(BOOKING ./ F LIGHT ./ CUST OMER) R2(BOOKING ./ F LIGHT ./ CUST OMER))))

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

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!

Hi, I have a question related to relational algebra. Thank you. 2.2 Optimize the following two relational algebra queries (Your marks wil depend on how well you present the key ideas of query...

Hi I am trying to better understand working involved in this question. I would appreciate if you provide working with your answer. Thanking you. 2.2 Optimize the following two relational algebra...

2.2 Optimize the following two relational algebra queries (Your marks will depend on how well you present the key ideas of query optimization in your answer). In addition to this, draw the query...

Hi, I am trying to better understand working involved in this question. I would appreciate if you provide working with your answer. Thanking you. 2.2 Optiize the following two relational algebra...

COMPLETE ALL THE QUESTIONS 1) Make a version of X.32[7] where the element type is a template argument. [10] ( 2.5) Given an Itor class like the one in X.32[8], consider how to provide iterators for...

Let A, B be sets. Define: (a) the Cartesian product (A B) (b) the set of relations R between A and B (c) the identity relation A on the set A [3 marks] Suppose S, T are relations between A and B, and...

database management system, pdf is attached COURSEWORK SECOND SEMESTER 2019/2020 SESSION (A192) COURSE CODE & NAME : BKAS3053 DATABASE MANAGEMENT SYSTEM LECTURER'S NAME : ASSOC. PROF. TS. DR. AIDI...

Have a C compiler which is ANSI conforming in all respects except that it has no facility for the definition, declaration or use of standard C structures. Outline a set of routines written in this...

2. Standardized Financial Statements Using the Amazon Financials provided below, prepare the common-size income statements and balance sheets for the two most recent years. and 3. Financial Ratios....

Moorefield Company has 11 million shares of stock outstanding and 90,000 number of 7.10% annual coupon bonds outstanding, par value is $800 each. The stock currently sells for $32 per share and has a...

The relevant range of activity for Dake Corporation is 2,300 units to 6,500 units. When you produce and sell 4,400 units, your average costs per unit are as follows: average cost per unit Direct...

Which prediction is analyzed using computational and mathematical power for large data sets? Future demand Future supply Data acquisition Financial acquisition

we need legal answer 1 9 9 . What is americium?

Assume that the banking system has total reserves of $100 billion. Assume also that required reserves are 10 percent of checking deposits and that banks hold no excess reserves and households hold no...

As shown in Figure 3, the overall labor-force participation rate of men declined between 1970 and 2000. At the same time, the labor-force participation rate of women increased sharply. This overall...

The Bureau of Labor Statistics announced that in February 2008, of all adult Americans, 145,993,000 were employed, 7,381,000 were unemployed, and 79,436,000 were not in the labor force. Use this...