1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
zhenek [66]
3 years ago
10

Suppose we have a relation schema R(A, B, C) with FD A rightarrow B. Suppose also that we decide to decompose this schema into S

(A, B) and T(B, C). Give an example of an instance of relation R whose projection onto S and T and subsequent rejoining as in Section 3.4.1 does not yield the same relation instance. That is, pi_A, B(R) pi_B, C (R) notequalto R.

Computers and Technology
1 answer:
4vir4ik [10]3 years ago
7 0

Answer:

Check the explanation

Explanation:

A relation schema is the fundamental schema for a table. Which is In a relational kind of database (what individuals naturally refer to when they talk about database) each take can be referred to as a "relation" . therefore a relational schema is the design for the table.

kindly check the attached image below to see the step by step solution to the question.

You might be interested in
What is the primary difference among a domain model, an analysis model, and a design model for the same project?
Aleks04 [339]

Answer:

The design model is the description of the model to be implemented, the analysis model is the model that links the design and the system or domain model while the domain model is the entire software implementation.

Explanation:

The domain model is the conceptual aspect of software engineering that comprises operational and data features. The analysis model is the schematic description of the system that links the design model to the system domain. The design model is also known as the object model as it shows an abstract representation of the implementation. It helps to test the quality of the software been developed.

8 0
3 years ago
She wants to sort the list based on the names of the first four gas in ascending order. Which command group dose she navigate to
zubka84 [21]

<u>Best method to sort data:</u>

Best method to sort for data people use excel sheet.  If we have 4 quarter sales data of each select man wise.

1. Open the MS Excel

2. Create blank sheet

3. Create list of salesman and quarter sales in each cells from A1….

4. Select all whole worksheet and paste it the data

5. Once data is copied, custom list is created and select advanced options dialog box, select required field and sorting is achieved.

This is simple’s method for sort the list based on the names of the first four gas in ascending order.

7 0
3 years ago
Read 2 more answers
HELP!!!
aleksley [76]

Answer:

The detail answer of this question is given in explanation section.

The simple answer is option B

Explanation:

Let took at each option:

A) an html tag

An html tag is used to start and end html document. It does not have anything to do with rendering.

B) a doctype declaration

The document type declaration is necessary because it tell the browser which version of html should be rendered.

C)Body tag tell the browser. it is the visible area of website.

D) A hear tag is used to clear meta data about website.

3 0
2 years ago
Read 2 more answers
People who are reading this:
Gnom [1K]

Answer:

Awe thanks hun!

Explanation:

3 0
3 years ago
Read 2 more answers
Give a tight bound on the number of times the z = z + 1 statement is executed. i = 2 while ( i &gt; 1 ) { i = floor(i/2) z = z +
Alinara [238K]

Answer:

zero ( 0) times.

Explanation:

In the code;

i = 2

while ( i > 2){

     i = floor( i/2 );

     z = z + 1;

}

the variable " i " is assigned the integer " 2 ", then the while statement loops with a condition of a greater " i " value and divides the value by two for every loop.

But in this case, the while statement is not executed as the value of " i " which is 2 is not greater than but equal to two.

4 0
3 years ago
Other questions:
  • Which string method counts the number of characters in a string?
    5·1 answer
  • To create a new query in Design view, click CREATE on the ribbon to display the CREATE tab and then click the ____ button to cre
    9·1 answer
  • Which of these is a requirement for developing game applications on devices running Apple’s iOS operating system?
    6·2 answers
  • In the Mouse Properties window, you can?
    8·1 answer
  • Please help with this
    8·1 answer
  • All of the following are examples of hardware, except:
    13·2 answers
  • Hi um... i just wanna say hi :P
    6·2 answers
  • The BCD number for decimal 473 is( ). a) 111011010; b) 010011110011; c) 010001110011; d)0010110110​
    15·1 answer
  • Which of the following is not a component of Power BI?
    5·1 answer
  • Data mining requires specialized data analysts to ask ad hoc questions and obtain answers quickly from the system. select one: t
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!