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Readme [11.4K]
3 years ago
11

The first query is computationally less expensive than the second query. (Assume no indexes exist on release_date.) Query 1: SEL

ECT DISTINCT(release_date) FROM books; Query 2: SELECT release_date FROM books;True or false?
Computers and Technology
1 answer:
sdas [7]3 years ago
7 0

Answer:

false

Explanation:

The term 'computationally expensive' means that a given mathematical function, code or an algorithm has high computational complexity. In addition, the mathematical function or algorithm will require several steps and procedures to be completed. Based on this, the statement made in this question is not true.

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What does this mean, i am so confused- Explain the importance of identifying the purpose/use for pre-production documents
irina1246 [14]

Answer: These are mostly used in interior design, fashion design, and advertising. they are often used to generate ideas for a client to meet their approval before making the final product. It can help in terms of planning because it could be used to create a design or a theme.

Explanation: yw

4 0
3 years ago
Write a function with this prototype:
sp2606 [1]

Answer:

Following are the code to this question:

#include <iostream> //defining header file  

using namespace std;

void numbers(ostream &outs, const string& prefix, unsigned int levels); // method declaration

void numbers(ostream &outs, const string& prefix, unsigned int levels) //defining method number

{

string s; //defining string variable

if(levels == 0) //defining condition statement that check levels value is equal to 0

{

outs << prefix << endl;  //use value

}

else //define else part

{

for(char c = '1'; c <= '9'; c++) //define loop that calls numbers method

{

s = prefix + c + '.'; // holding value in s variable  

numbers(outs, s, levels-1); //call method numbers

}

}

}

int main() //defining main method

{

numbers(cout, "THERBLIG", 2); //call method numbers method that accepts value

return 0;

}

Output:

please find the attachment.

Explanation:

Program description:

  • In the given program, a method number is declared, that accepts three arguments in its parameter that are "outs, prefix, levels", and all the variable uses the address operator to hold its value.
  • Inside the method a conditional statement is used in which string variable s and a conditional statement is used, in if the block it checks level variable value is equal to 0. if it is false it will go to else block that uses the loop to call method.
  • In the main method we call the number method and pass the value in its parameter.  

5 0
3 years ago
Please I need help with this !!!! <br> Complete the table given below.
UkoKoshka [18]

Answer:

  • DBMS , function - include concurrency, security, backup and recovery, integrity and data descriptions.
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8 0
3 years ago
How to Ctrl + shift + F4 but in a HP laptop?​
ludmilkaskok [199]

Answer:

Hit the X Button Located on the top right corner or hit Control, Alt, Delete

Explanation:

Hitting the X button will make you exit the whole cite, or hitting Control, Alt, Delet, will make you go to the task bar, in which you can go to the bottom right of that screen and it should say end task

3 0
3 years ago
Read 2 more answers
How does making a phone call differ when using: A public phone A cell phone
rosijanka [135]

Answer:

Differ in the quality of their transmission.

Explanation:

For example, when using the public phone box, wired transmission is done not wireless as in cell phones. Public phone box use electronic signals transmitted through a cable network to send voice data which are not very effective for long distance communication.

However, cell phones wirelessly send electromagnetic wave signal to a cell tower close to the caller and then the information is then transmitted to cell tower close to the receiver within a split of a second. This method of communication has much advantages.

7 0
3 years ago
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