In a relational database, the three basic operations used to develop useful sets of data are:_________.
a. select, project, and join.
b. select, project, and where.
c. select, from, and join.
d. select, join, and where.

Answers

Answer 1

In a relational database, the three basic operations used to develop useful sets of data are:

[tex]\sf\purple{a.\: Select, \:project,\: and\: join. }[/tex]

[tex]\large\mathfrak{{\pmb{\underline{\orange{Mystique35 }}{\orange{❦}}}}}[/tex]

Answer 2

The basic operations used to develop useful sets of data in relational database are Select, Project and Join.

The Select and Project are of important use in selecting columns or attributes which we want to display or include in a table.

The join function allows the merging of data tables to form a more complete and all round dataset useful for different purposes.

Hence, the basic operations are select, project, and join.

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Related Questions

How are dates and times stored by Excel?​

Answers

Answer:

Regardless of how you have formatted a cell to display a date or time, Excel always internally stores dates And times the same way. Excel stores dates and times as a number representing the number of days since 1900-Jan-0, plus a fractional portion of a 24 hour day: ddddd. tttttt

Explanation:

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Dates are stored as numbers in Excel and count the number of days since January 0, 1900. Times are handled internally as numbers between 0 and 1. To clearly see this, change the number format of cell A1, B1 and C1 to General. Note: apparently, 42544 days after January 0, 1900 is the same as June 23, 2016

While saving a document to her hard drive, Connie's computer screen suddenly changed to display an error message on a blue background. The error code indicated that there was a problem with her computer's RAM. Connie's computer is affected by a(n) __________.

Answers

Answer:

The right answer is "Hardware crash".

Explanation:

According to the runtime error message, this same RAM on your machine was problematic. This excludes file interoperability or compliance problems as well as program error possibilities.Assuming implementation performance problems exist, the timeframe that would save the information would be typically longer, but there's still a lower possibility that the adequacy and effectiveness color will become blue but instead demonstrate warning would appear.

Thus the above is the right solution.

Write a method that prints on the screen a message stating whether 2 circles touch each other, do not touch each other or intersect. The method accepts the coordinates of the center of the first circle and its radius, and the coordinates of the center of the second circle and its radius.

The header of the method is as follows:

public static void checkIntersection(double x1, double y1, double r1, double x2, double y2, double r2)


Hint:

Distance between centers C1 and C2 is calculated as follows:
d = Math.sqrt((x1 - x2)2 + (y1 - y2)2).

There are three conditions that arise:

1. If d == r1 + r2
Circles touch each other.
2. If d > r1 + r2
Circles do not touch each other.
3. If d < r1 + r2
Circles intersect.

Answers

Answer:

The method is as follows:

public static void checkIntersection(double x1, double y1, double r1, double x2, double y2, double r2){

    double d = Math.sqrt(Math.pow((x1 - x2),2) + Math.pow((y1 - y2),2));

    if(d == r1 + r2){

        System.out.print("The circles touch each other");     }

    else if(d > r1 + r2){

        System.out.print("The circles do not touch each other");     }

    else{

        System.out.print("The circles intersect");     }

}

Explanation:

This defines the method

public static void checkIntersection(double x1, double y1, double r1, double x2, double y2, double r2){

This calculate the distance

    double d = Math.sqrt(Math.pow((x1 - x2),2) + Math.pow((y1 - y2),2));

If the distance equals the sum of both radii, then the circles touch one another

    if(d == r1 + r2){

        System.out.print("The circles touch each other");     }

If the distance is greater than the sum of both radii, then the circles do not touch one another

   else if(d > r1 + r2){

        System.out.print("The circles do not touch each other");     }

If the distance is less than the sum of both radii, then the circles intersect

   else{

        System.out.print("The circles intersect");     }

}

Examine the following output:
4 22 ms 21 ms 22 ms sttlwa01gr02.bb.ispxy.com [154.11.10.62]
5 39 ms 39 ms 65 ms placa01gr00.bb.ispxy.com [154.11.12.11]
6 39 ms 39 ms 39 ms Rwest.plalca01gr00.bb.ispxy.com [154.11.3.14]
7 40 ms 39 ms 46 ms svl-core-03.inet.ispxy.net [204.171.205.29]
8 75 ms 117 ms 63 ms dia-core-01.inet.ispxy.net [205.171.142.1]
Which command produced this output?
a. tracert
b. ping
c. nslookup
d. netstat

Answers

Answer:

a. tracert

Explanation:

Tracert is a computer network diagnostic demand which displays possible routes for internet protocol network. It also measures transit delays of packets across network. The given output is produced by a tracert command.

HELP ITS A TESTTT!!!Which symbol shows auto correct is in use?

A-a white light bulb
B-A green plus sign
C-A flashing red circle
D-A yellow lightning bolt

Answers

After careful consideration the answer to this problem looks to be D

Answer:

D

Explanation:

computer is an ............. machine because once a task is intitated computer proceeds on its own t ill its completion.​

Answers

Answer:

I think digital,versatile

computer is an electronic digital versatile machine because once a task is initiated computer proceeds on its own till its completation.

The _________ attack exploits the common use of a modular exponentiation algorithm in RSA encryption and decryption, but can be adapted to work with any implementation that does not run in fixed time.
A. mathematical.
B. timing.
C. chosen ciphertext.
D. brute-force.

Answers

Answer:

chosen ciphertext

Explanation:

Chosen ciphertext attack is a scenario in which the attacker has the ability to choose ciphertexts C i and to view their corresponding decryptions – plaintexts P i . It is essentially the same scenario as a chosen plaintext attack but applied to a decryption function, instead of the encryption function.

Cyber attack usually associated with obtaining decryption keys that do not run in fixed time is called the chosen ciphertext attack.

Theae kind of attack is usually performed through gathering of decryption codes or key which are associated to certain cipher texts

The attacker would then use the gathered patterns and information to obtain the decryption key to the selected or chosen ciphertext.

Hence, chosen ciphertext attempts the use of modular exponentiation.

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The compound known as butylated hydroxytoluene, abbreviated as BHT, contains carbon, hydrogen, and oxygen. A 1.501 g sample of BHT was combusted in an oxygen rich environment to produce 4.497 g of CO2(g) and 1.473 g of H2O(g). Insert subscripts below to appropriately display the empirical formula of BHT.

Answers

Answer:

C15H24O

Explanation:

n(C) = 4.497 g/44g/mol = 0.1022

Mass of C = 0.1022 × 12 = 1.226 g

n(H) = 1.473g/18 g/mol = 0.0823 ×2 moles = 0.165 moles

Mass of H = 0.0823 × 2 ×1 = 0.165g

Mass of O= 1.501 -(1.226 + 0.165)

Mass of O= 0.11 g

Number of moles of O = 0.11g/16g/mol = 0.0069 moles

Dividing through by the lowest ratio;

0.1022/0.0069, 0.165/0.0069, 0.0069/0.0069

15, 24, 1

Hence the formula is;

C15H24O

Answer

The formula is C1SH240

The following pseudocode describes how a widget company computes the price of an order from the total price and the number of the widgets that were ordered. Read the number of widgets. Multiple the number of widgets by the price per widget of 9.99. Compute the tax (5.5 percent of the total price). Compute the shipping charge (.40 per widget). The price of the order is the sum of the total widget price, the tax, and the shipping charge. Print the price of the order

Answers

Answer:

The program in Python is as follows:

widget = int(input("Widgets: "))

price = widget * 9.9

tax = price * 0.55

ship = price * 0.40

totalprice = price + tax + ship

print("Total Price: $",totalprice)

Explanation:

The question is incomplete, as what is required is not stated.

However, I will write convert the pseudocode to a programming language (in Python)

Get the number of widgets

widget = int(input("Widgets: "))

Calculate price

price = widget * 9.9

Calculate the tax

tax = price * 0.55

Calculate the shipping price

ship = price * 0.40

Calculate the total price

totalprice = price + tax + ship

Print the calculated total price

print("Total Price: $",totalprice)

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