Question: Give an example of an expression defining a materialized view and two situations (sets of statistics for the input relations and the differentials) such that

Give an example of an expression defining a materialized view and two situations (sets of statistics for the input relations and the differentials) such that incremental view maintenance is better than recomputation in one situation and recomputation is better in the other situation.

Step by Step Solution

★★★★★

3.35 Rating (158 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

Let r s and t be three relations Consider a materialized view on these defined by ... 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

Document Format (1 attachment)

16-CS-DB (316).docx

120 KBs Word File

Students Have Also Explored These Related Databases Questions!

Give an example of how statistics might be useful to the person in the scenario. a. An auditor is looking for inflated broker commissions in stock transactions. b. An industrial marketer is...

Give an example of a situation related to your current job (or the job you would like to have after graduation) in which you would use a one-way ANOVA. 1. What is your independent variable? 2. What...

Give an example of how statistics might be useful to the person in the scenario. a. A personnel executive is examining job turnover by gender in different restaurants in a fast-food chain. b. An...

1. Calculate the sample size needed given these factors: one-tailed t-test with two independent groups of equal size small effect size (see Piasta, S.B., & Justice, L.M., 2010) alpha =.05 beta = .2...

ARTICLE 2. RESISTERS AT WORK: GENERATING PRODUCTIVE RESISTANCE IN THE WORKPLACE. Introduction Resistance has had a checkered career. In the popular imagination, after the experiences of various...

This is your week 4 paper for HRMT413. READ FULLY CHAPTER 10 OF YOUR TEXT: 4 page paper Consider your current or any former work location at which you have been employed. In a power point or word...

Microkernel operating systems aim to address perceived modularity and reliability issues in traditional "monolithic" operating systems. (i) Describe the typical architecture of a microkernel...

Guidelines for the Methods and Results paper Below are the step-by-step instructions for completing the paper due in Lesson 12. Follow these steps, and use the knowledge you've gained this semester...

5 Attraction to Groups Learning Objectives What We Will Be Investigating What makes a group work most efficiently? What techniques are available to make group members feel more as if they are part of...

Alavi & Leidner/Knowledge Management MISQ REVIEW REVIEW: KNOWLEDGE MANAGEMENT AND KNOWLEDGE MANAGEMENT SYSTEMS: CONCEPTUAL FOUNDATIONS AND RESEARCH ISSUES1, 2 By: Maryam Alavi John and Lucy Cook...

Consider a memory system with the following parameters: Tc = 100 ns Cc = 0.01 cents > bit Tm = 1,200 ns Cm = 0.001 cents > bit a. What is the cost of 1 MByte of main memory? b. What is the cost of 1...

Create a new Basin Model for HEC-HMS Problem 5.2 to reflect a detention pond near Junction 2. Assume that the pond can be modeled in such a way that only the runoff from subbasin 3 should be routed...

Discuss why, in real life, the arbitrage process in MM s proposition 1 will not occur

Using the data in the worksheet Consumer Transportation Survey, develop 95% confidence intervals for the following: a. The proportion of individuals who are satisfied with their vehicle b. The...

The investments of Charger Inc. include a single investment: 14,500 shares of Raiders Inc. common stock purchased on February 24, 2014, for $38 per share including brokerage commission. These shares...

Refer to the text discussion of Lopez Plastics Company on pages 136140. Assume that the company has the traditional cost accounting system described in Exhibit 4-6. The top management team wants to...

Memotec, Inc., manufactures and sells a unique electronic part. Operating results for the first three years of activity were as follows (absorption costing basis): Sales dropped by 20% during Year 2...

Ralph and Kathy Gump are married with one 20-year-old dependent child. Ralph earns a total of $39,000 and estimates their itemized deductions to be $16,000 for the year. Kathy is not employed. Use...

Korean chaebols hire individuals to fit their cultures. To what extent might this practice be considered unethical in Canada?

Identify the TRUCK tables candidate key(s).

For each table, identify a superkey and a secondary key.

What data redundancies do you detect? How could those redundancies lead toanomalies? PROJECT CODE PROJECT MANAGER MANAGER PHONE 21-52 25-2D 25-5A 25-9T 27-40 29-2D 31-7P MANAGER ADDRES 3334 Lee Rd.,...

Identify and discuss the serious data redundancy problems exhibited by the file structure shown inFigure. PROJ NUM PROJ NAME EMP NUMEMP NAME JOB CODE JOB_ CHG HOUR PROJ HOURS EMP PHONE 1 Hurricane 1...

Looking at the EMP_NAME and EMP_PHONE contents in Figure, what change(s) would yourecommend? PROJ NUM PROJ NAME EMP NUMP NAME JBCODEOB CHO HOUR [PROJ HOURS EMP PHONE 1 Hurricane 1 Hurricane 1...

Use your ti calculator to write down commands for b A hypotheses test, some information from one sample, and a standard error from a randomization distribution are provided. avalgib noming s...