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sergejj [24]
3 years ago
14

What is the purpose of creating a primary key in a database

Computers and Technology
1 answer:
ss7ja [257]3 years ago
7 0

Answer:

Basically it creates a unique identifier for each row in your table and that can help you link your table to other tables using primary key as link

Explanation:

"Primary key allows you to create a unique identifier for each row in your table. It is important because it helps you link your table to other tables (relationships) using primary key as links."

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PLZ HELP!!!
mariarad [96]
Answer: A. Usability testing
Explanation:
Usability testing would be the correct answer because if the user interface isn't "frendly" then people won't be able to use it properly. Or if you are refering to the word friendly as looking safe, then even more so would be usability testing. Because if people don't like the fonts and styles of the user interface, they might not use it at all.
8 0
3 years ago
Suppose you have two tables: officer and gentleman. what question(s) can be asked by using the union operator?
Alik [6]
The union of two tables is basically the total of the two tables, so "or" questions would be my guess.
8 0
3 years ago
True or False? Any edition or version of Windows can join a domain.
Veseljchak [2.6K]

Answer: TRUE! 100%

If I was helpful i would to be rated brainliest please thank you!

Explanation:

8 0
2 years ago
. Generate 106 message bits (random binary values (bool/int) ). 2. Generate the corresponding code bits for r = 3, 5. This means
N76 [4]

Answer:

While loops are typically used when you don’t know how many times the loop needs to repeat. The body of the loop will repeat while the condition is true. The logical expression will be evaluated just before the body of the loop is repeated.

Let’s say that we want to find the square root of a number. For some square roots, you’re never going to be exact. Let’s say that we want to find a square root that, when multiplied by itself, is within 0.01 of the square we want. How do we do it? There’s a really old process that we can apply here.

Start by guessing 2.

Compute the guess squared.

Is the guess squared close to the target number? If it’s within 0.01, we’re done. We’ll take the absolute value of the difference, in case we overshoot. (In Python, abs is the absolute value function.)

If it’s not close enough, we divide the target number by our guess, then average that value with our guess.

That’s our new guess. Square it, and go back to Step #3.

Explanation:

7 0
4 years ago
Write a method called removeInRange that accepts four parameters: an ArrayList of integers, an element value, a starting index,
Murrr4er [49]

Answer:

public static void removeInRange(List<Integer> list, int value, int start, int end) {

       for (int i = end - 1; i >= start; i--) {

           if (list.get(i) == value) {

               list.remove(i);

           }

       }

       System.out.println(list);

   }

Explanation:

- Create a method named <em>removeInRange</em> that takes four parameters, a list, an integer number, a starting index and an ending index

- Inside the method, initialize a <u>for loop</u> that iterates between starting index and ending index

- If any number between these ranges is equal to the given <em>value</em>, then remove that value from the list, using <u>remove</u> method

- When the loop is done, print the new list

7 0
3 years ago
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