Question: Let R be a relation schema and R be a relation with respect to R. Let S be a relation schema and S be a

Let R be a relation schema and R be a relation with respect to R. Let S be a relation schema and S be a relation with respect to S. We assume that LaTeX: R\cap S e\varnothing R S . Show formally (without examples) that the outer-join operator R S is a derived Relational Algebra operator. That is, it can be expressed by the 5 (+1) basic Relational Algebra operators. You are allowed to make use of derived Relational Algebra operators that have already been shown to be derived in class. Explain your definition afterwards

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!

Help with just the answers Given the questions of funeutional dependency and the table below answer (5 points) Function Dependency OFD). Let R be a relation schema, and let a and B be subset of R....

1456HHSC attend all (a) In the quantum teleportation protocol, Alice and Bob are every in possession of one qubit of a couple in the joint country00i + statei. Explain how the protocol works. In...

MATH 3210 Practice Final Exam for Discrete I You now have several quizzes and hour exams to study. The following in mainly a repetition of your previous practice and actual exams. 1. (a) Use truth...

This question prompts you to delve deeper into the concepts of Relational Algebra, which can be thought of as an abstract query language. At this level, query performance is not a concern, as query...

Note: All ML code must be explained clearly (INJAVAXX)and should be free of needless complexity. 2 CST.2016.1.3 2 Foundations of Computer Science Please help. (2c) (a) A prime number sieve is an...

I need it in JAVAx Objects: Electronic health records (EHRs) in a nationwide service. Policy: The owner (patient) may read from its own EHR. A qualified and employed doctor may read and write the EHR...

This Journal entry has two parts: Part A: Select TWO examples of solutions to trig identities from the Content section ( Examples or Check your Understanding ) or from Assignment 1 Solutions....

solve Data Structures and Algorithms (a) Describe an efficient algorithm to determine whether two finite line segments in a plane intersect. You may assume that the end points of each line are given...

NAME______________ Preactice Exam for MATH 3210 Directions: A main focus of this course is that each person develop the logical processes necessary to explain/prove their results in a clear, precise...

a) [5 pts) Let R be a relation with schema (A1, A2, ..., A, B1, B2, ..., Bm) and let S be a relation with schema (B1, B2, ..., Bm); that is, the attributes of S are a subset of the attributes of R....

For Starbucks (SBUX), the following table has information for revenues, Profit Margin (PM), and Asset Turnover (ATO) for the past 4 years: Fiscal 2014 Fiscal 2015 Fiscal 2016 Fiscal 2017 Fiscal 2018...

Calculate the molar volume of Cl2 gas at 80C and 230 kPa using (a) the ideal gas law and (b) the van der Waals equation. In order to solve part (b), you can use the answer of part (a) as a first...

I need the formulas for each cell on excel. Show all images Show all images Show all images done loading

A continuous, steady-state distillation column with a total condenser and a partial reboiler separates methanol from water at one atmosphere total pressure. The feed rate to the column is F...

From a Comparable Worth Standpoint, what is the situation with regard to Federal Gender-based Employee Pay Equity?

Provide an example of how drilling down further into information can yield new results.

What do Dimensions represent in OLAP Cubes?