Compare the cost of two different query plans for the following query: salary > 40000 select (EMPLOYEE

Question:

Compare the cost of two different query plans for the following query: salary > 40000 select (EMPLOYEE |X| DNO=DNUMBER DEPARTMENT) Use the database statistics in Figure 15.8

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For book-img-for-question

Fundamentals of Database Systems

ISBN: 978-0136086208

6th edition

Authors: Ramez Elmasri, Shamkant Navathe

See More Books

Question Posted: Apr 26, 2016 08:21 AM

See More Questions

Consider the following relational schema and SQL query. The schema captures information about employees, departments, and company finances (organized on a per department basis). Emp(eid: integer,...
For each of the following queries, state whether the query is valid and for the valid ones should how each of the queries would be mapped onto a query on the underling base tables. (a) SELECT * FROM...
Consider the relational database schema of Figure 3.5. Suppose that all the relations were created by (and hence are owned by) user X, who wants to grant the following privileges to user accounts A,...
Metlock Advertising Agency Inc. was founded in January 2000. Presented below are adjusted and unadjusted trial balances as at December 31, 2023 Cash Accounts receivable Supplies Prepaid insurance...
Multiple Choice Questions Franklin Glass Works uses a standard cost system in which manufacturing overhead is applied on the basis of standard direct labor-hours. Each unit requires two standard...
What are the differences between in-game advertising and advergame advertising?
Managing diabetes People with diabetes measure their fasting plasma glucose (FPG; measured in units of milligrams per milliliter) after fasting for at least 8 hours. Another measurement, made at...
(a) What are the advantages of using analytical procedures as substantive tests? (b) If the engagement team decides to use analytical procedures for the Bees' audit, how will the audit plan differ...
Mauro Products distributes a single product, a woven basket whose selling price is $17 per unit and whose variable expense is $14 per unit. The companys monthly fixed expense is $7,800. Required: 1....
Harrison Printing has projected its sales for the first eight months of 2014 as follows: Harrison collects 20 percent of its sales in the month of the sale, 50 percent in the month following the...
Extend the sort-merge join algorithm to implement the LEFT OUTER JOIN operation.
Figure 23.6 shows the log corresponding to a particular schedule at the point of a system crash for the four transactions T1, T2, T3, and T4 of Figure 19.4. Suppose that we use the immediate update...
Fill in the blank with an appropriate word, phrase, or symbol(s). Multiplication of matrices is possible only when the number of ________ of the first matrix is the same as the number of ________ of...
int rFibNum(int a, int b, int n) { if(n == 1) return a; else if( n == 2) return b; else return rFibNum(a,b, n-1) + rFibNum(a, b, n-2); } In the code above; a) how many base cases are there? b) what...
Watch the Super Nanny (i.e., Jo Frost) episode "The Orm Family" (Season 1, Episode 3) and answer the following questions. Unless otherwise specified, your answers should focus on Declan (the 3 year...
2. Suppose Ford officials were asked to justify their decision. What moral principles do you think they would invoke? Assess Ford's handling of the Pinto from the perspective of each of the moral...
2. You have been asked to design the proto-type of an Automatic Grocery Vending Machine 10 (AGVM) for the super store. Automatic Grocery Vending Machine (AGVM) is a machine where different types of...
1. What does Porter's 5 Forces analysis strategy do? 2. Do most people agree Why? or disagree with this aspect Why? Here is the reference video, https://www.youtube.com/watch?v=Dfp23xSqpdk 3. What...
When 7.11 g NH 4 NO 3 is added to 100 mL water, the temperature of the calorimeter contents decreases from 22.1 C to 17.1 C. Assuming that the mixture has the same specific heat as water and a mass...
Copy and complete the statement. 3800 m ? km =
How is a horizontal partitioning of a relation specified? How can a relation be put back together from a complete horizontal partitioning?
How is a vertical partitioning of a relation specified? How can a relation be put back together from a complete vertical partitioning?
Discuss the naming problem in distributed databases.
Present Value Computations Using the present value tables, solve the following. ( Click here to access the PV and FV tables to use with this problem. ) Round your answers to two decimal places....
A company provided the following data: Sales $887,000 Variable costs $546,800 Fixed costs $310,000 Expected production and sales in units 36,000 What is the break-even point in sales dollars? Please...
How to solve them..equation and explain ..please.. 1. Selected information from the companys financial records is presented below Equipment, December 31, 2013 $300,000 Equipment, December 31, 2014...

Compare the cost of two different query plans for the following query: salary > 40000 select (EMPLOYEE

Question:

Step by Step Answer:

One plan might be for the following query tree We can use the salary index on EMPLOYEE for the select operation The table in Figure 188a indicates tha...View the full answer

Fundamentals of Database Systems

Students also viewed these Computer Sciences questions