Question: Database System SQL Query EXERCISE.3 -Consider the following relation R (A, B, C, D, E) Select which of the following projections have the same cardinality

Database System SQL Query

Database System SQL Query EXERCISE.3 -Consider the following relation R (A, B,

EXERCISE.3 -Consider the following relation R (A, B, C, D, E) Select which of the following projections have the same cardinality as R 1. PROJ AB.cp (R) 2. PROJ Ac (R) 3. PROJ B,c (R) 4. PROJ c R) 5. PROJ c,D (R)

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!

Relational Algebra EXERCISE6 Consider the following relation R (A, B, c, D, E) Select which of the following projections have the same cardinality as R elation R (A, B, c, D,E) 1. PROJ A.B.cD R) 2....

EXERCISE 3 Consider the following relation R (A, B, C, D, E) Select which of the following projections have the same cardinality as R 1. PROABcD (R) 2. PROJAC (R) 3. PROJ B.c (R) 4. PROJ c (R) 5....

Consider a relation R (A, B, C, D, E) and the following query: select * from R where A = '123' and B = '456'. Suppose relation R has 1000 tuples and have 50 unique values of A with each value...

Database System SQL Query EXERCISE 4 . Ri (A, B, C ) , with IR, l = 100 constratin between C and R .R2 ( D, E, F);with Ral= 200 1 . PROJ A, B (RI) 2. PROj F (R2) 3. PROJ B, c (R) 4. PROJ G(K) 5. R1...

A creative engineer suggests structuring the TLB so that not all the bits of the presented address need match to result in a hit. Suggest how this might be achieved, and what might be the costs and...

-- ************************************************************* -- This script creates the database -- for Labs 4-7 based on OM (Order Management) database -- **REVISED by PRP to remove some orders...

Solve please Consider a relation scheme R = (A, B, C, D, E, H) on which the following 1 functional dependencies hold: {A->B, BC-> D, E->C, D->A}. Write the Apply 5 candidate keys of R? Consider the...

This question involves the use of AGGREGATE linear PYTHOIN regression on the Auto data set. (a) Perform a simple linear regression with mpg as the response and horsepower as the predictor. Describe...

Probability and Statistics - Problem Set c Keith M. Chugg October 2, 2015 1 Preliminaries, Combinatorics, Set Probability 1.1. A number of bats are in a cave. 2 bats can see out of their left eye. 3...

Data gistrun sending inside a pack fills in as conventional allowing subordinate rules to execute on progressive clock cycles. Correspondence between gatherings conventionally causes a surprising...

An entity, with a year-end of 31 December 20X8, issued 200,000 shares at full market price of $3 on 1 July 20X8. Calculate the EPS for each of the years. Relevant information 20X8 20X7 Profit...

C Ltd manufactures a range of products and the data below refer to one product which goes through one process only. The company operates a 13 four-weekly reporting system for process and products...

Which of the following is an adjustment in the alternative minimum tax calculation? a . State income tax b . Home mortgage interest c . Life of depreciation calculation d . Private activity bond

On September 30, 2024, Sternberg Company sold office equipment for $12,000. The equipment was purchased on March 31, 2021, for $24,000. The asset was being depreciated over a five-year life using the...

KEY QUESTION Suppose the full-employment level of real output ( Q ) for a hypothetical economy is $250 and the price level ( P ) initially is

LAST WORD Why is it so hard for actively managed funds to generate higher rates of return than passively managed index funds having similar levels of risk? Is there a simple way for an actively...

KEY QUESTION What are the four supply factors of economic growth? What is the demand factor? What is the efficiency factor? Illustrate these factors in terms of the production possibilities curve.