Question: Select operation in SQL is equivalent to a . the projection operation in relational algebra b . the selection operation in relational algebra, except that

Select operation in SQL is equivalent to
a. the projection operation in relational algebra
b. the selection operation in relational algebra, except that select in SQL
retains duplicates
c. the selection operation in relational algebra
d. the projection operation in relational algebra, except that select in SQL
retains duplicates
Select operation in SQL is equivalent to a. the projection operation

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!

Q:

What is the difference a select statement used in conjunction with the relational algebra Selection operation and a Select statement in conjunction with the relational algebra Projection operation?

Q:

the following relational algebra questions based on tables S1 and S2 (below) Question 1 What is the output of S1 S2 ? The row identified by sid 22 The rows identified by sid 31 and 58 The row...

Q:

2. Set vs. Multiset Semantics SQL, by default, uses multiset (bag) semantics, whereas the pure relational model is set semantics (no duplicates.) Even if relations have no duplicates, it is possible...

Q:

I need help with this database worksheet. Thanks in advance! True / False Questions ( 2 points each ) 1 . A composite primary key is required for every table in a normalized database schema. 2 . Data...

Q:

which of the following is true about the SELECT clause in the SQL DML language. Question 2 2 options: A SELECT lists a set of attributes desired in the result which corresponds to a projection...

Q:

9 2 . ITCS 3 4 0 2 . 2 3 1 7 . 3 1 9 - 1 5 Midterm Exam Midterm Exam 1 What does DBMS stand for? 1 a . None of these b . Database Management System c . Data Base Management Software d . Database...

Q:

Design a table with 10 tuples (rows) For each of four tables provided in airline data base schema. B) Fill in tables with random values. (Values should be meaningful) C) Tables that have common...

Q:

Query Optimization and Equivalence Rules (20 points) Using the relational algebra to specify queries can be tedious at times, but it also has a big benefit that there are many different ways to state...

Q:

Query Optimization and Equivalence Rules (20 points) Using the relational algebra to specify queries can be tedious at times, but it also has a big benefit that there are many different ways to state...

Q:

Question I (80 points total) Consider the following relational database for storing data about employees and projects: employee (employee_ID, name, annual salary) project (project_name, budget)...

Q:

What are the sources and causes of complexity in our tax system? Which, if any, of these causes are correctable?

Q:

In your opinion, what was the most important concept you learned in this accounting course (list one and only one) Defend your answer

Q:

The account that reports the amount that may not be collected and is matched against credit sales of the period is referred to as Blank _ _ _ _ _ _ . Multiple choice question. sales discounts sales...

Q:

Suppose you hold LLL employee stock options representing options to buy 10,400 shares of LLL stock. You wish to hedge your position by buying put options with three- month expirations and a $28.85...

Q:

describe the skills shortages encountered by employers, their causes and possible solutions

Q:

2. Outline the major stages of the human resource planning process, and comment on the key considerations at each stage.

Q:

4. Explain what is meant by the terms skills shortages and skills gaps. Why do they arise and what can employers do about them?