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Viktor [21]
3 years ago
8

The symbol asterisk(*) in a select query retrieves​

Computers and Technology
1 answer:
Natali [406]3 years ago
3 0

Answer:

The answer to this question is given below in the explanation section.

Explanation:

The symbol asterisk (*) in a select query retrieve all result of column in the table. For example, table named "employee" has three column such as <em>id, name, address</em>.

To apply the symbol asterisk (*) in select querry select all the columns in the result.

for example:

select * employee;

this query statement selects all columns of table "employee" in the result.

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What is the "thinking work" of the computer? How does it help the computer?
anyanavicka [17]

Answer:

El pensamiento computacional es una forma de pensar que utiliza habilidades propias de las ciencias de la computación, como la descomposición y resolución de problemas, lógica, el reconocimiento de patrones y la abstracción

Explanation:

Un computador sirve para guardar los teléfonos de tus amigos, las tareas del colegio, los trabajos de tu papá y mamá y hasta las cartas que le envías a tu novia.

4 0
3 years ago
The owner of a candle shop has asked for your help. The shop sells three types of candles as shown below:
Keith_Richards [23]

Answer:

import java.util.Scanner;

public class Main {

 public static void main(String[] args) {

   double total = 0;

   double fPrice, sPrice, tPrice;

   int firstN = 0, secdN = 0, thirdN = 0, fTime, sTime, tTime;

   int totalT = 0;

   isEnd = "n";

   for (;;){

       if (isEnd == "y"){

           break;

       }

       Scanner in = new Scanner(System.in);

       int option = in.nextInt();

       switch (option){

         case 1:

             fPrice = 2.50;

             fTime = 5;

             System.out.print("Enter number of items: ");

             firstN += in.nextInt();

             totalT += fTime * firstN;

             total += fPrice * firstN;

             break,

         case 2:

             sPrice = 3.75;

             sTime = 7;

             System.out.print("Enter number of items: ");

             secdN += in.nextInt();

             totalT += sTime * secdN;

             total += sPrice * secdN;

             break,

         case 3:

             tPrice = 5.99;

             tTime = 12;

             System.out.print("Enter number of items: ");

             thirdN += in.nextInt();

             totalT += tTime * thirdN ;

             total += tPrice * thirdN;

             break,

        default:

             System.out.println("Looking forward to the Weekend");

       }

       System.out.print("Do you want to end the order? y/n: ");

       isEnd = in.nextLine();

   }

   System.out.println("Number of Type 1 candles bought : "+firstN);

   System.out.println("Number of Type 2 candles bought : "+secdN);

   System.out.println("Number of Type 3 candles bought : "+thirdN);

   System.out.println("Total cost is : "+total);

   System.out.println("Total burn time is : "+totalT);

   double costPerBurn = (totatT * 60) / total;

   System.out.println("Cost per minute : "+ costPerBurn);

 }

}

Explanation:

The Java program creates a continuous for-loop statement that gets the candle type, price and amount ordered from a switch and accumulates the total cost and burn time of the candles bought and the cost per minute burn of the candles consecutively.

3 0
3 years ago
The elements of an integer-valued array can be set to 0 (i.e., the array can be cleared) recursively as follows: An array of siz
dangina [55]

Answer:

The method definition to this question can be given as:

Method definition:

public void clear(int[] arr, int num) //define method clear.

{

   if (num == 0) //if block

{

       return 0;  return value.

}

else //else block

{

 arr[num - 1] = 0; //assign value in arr.

return arr[];  //return value.

}

}

clear(arr, num - 1);   //calling

Explanation:

The description of the above method definition as follows:

  • Firstly we define a method that is "clear" that does not return any value because its return type is "void". This method accepts two integer variables that are "arr[] and num" where arr[] is an array variable and num is an integer variable.
  • Inside a method, we use a conditional statement in if block we check that num variable value is equal to 0. if this condition is true so, it will return 0 otherwise it will go to else block in else block it will assign value in variable arr[num-1] that is "0" and return arr value.

4 0
4 years ago
There are two cons to an OLTP database. Which of the following are a solution of these cons?​
Delicious77 [7]

Answer:

The answer is below

Explanation:

An OLTP (Online transaction processing) database is a database that allows for quick transaction processing. It involves inserting, deleting, updating data in the database.

OLTP has many drawbacks like if the system fails, all transactions are going to have problems. Also, since multiple users are allowed to access the data, it makes it prone to hackers.

The solution to the problems associated to the OLTP database is the OLAP (online analytical processing) database.

The OLAP systems allow users to analyze database information from multiple database systems at one time thereby allowing analysis for business decisions.

6 0
4 years ago
Two technicians are discussing MAP sensors. Technician A says that the MAP sensor should be replaced if anything comes out of th
anygoal [31]

Answer:

Both are correct.

Explanation:

Both technicians are correct in this scenario. Technician A point of view is correct as well as technician B.

3 0
3 years ago
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