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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."

You might be interested in
If the object instance is created in a user program, then the object instance can access both the public and private members of
rewona [7]

Answer:

False

Explanation:

The private member of a class is not accessible by using the Dot notation ,however the private member are those which are not accessible inside the class they are accessible outside the class  .The public member are accessible inside the class so they are accessible by using the dot operator .

<u>Following are the example is given below in C++ Language </u>

#include<iostream>   // header file

using namespace std;  

class Rectangle

{    

   private:  

       double r; // private member  

   public:      

       double  area()  

       {     return 3.14*r*r;  

       }        

};  

int main()  

{    

  Rectangle r1;// creating the object  

   r1.r = 3.5;  

 double t= r1.area(); // calling

cout<<" Area is:"<<t;  

   return 0;  

}  

Output:

compile time error is generated

<u>The correct program to access the private member of class is given below </u>

#include<iostream>   // header file

using namespace std;  

class Rectangle

{    

   private:  

       double r; // private member  

   public:      

       double  area()  

       {    

r1=r;

double t2=3.14*r2*r2;

return(t2); // return the value  

       }        

};  

int main()  

{    

  Rectangle r1;// creating the object  

   r1.r = 1.5;  

 double t= r1.area(); // calling

cout<<" Area is:"<<t;  

   return 0;  

}  

Therefore the given statement is False

5 0
3 years ago
To remove white space, double-click this icon.
sweet [91]
Follow these steps:<span>Click the Microsoft Office Button, and then click Word Options.
In the left pane, click Customize.In the Choose commands from list, click All Commands.<span>
Click White Space Between Pages, click Add, and then click OK.
The White Space Between Pages option will appear on the Quick Access Toolbar.</span></span>(google)
I hope I answered your question!
4 0
3 years ago
Backing up and synchronization are the same thing. <br><br>A.)True<br>B.) False​
Sholpan [36]

Answer: A.)true

Explanation: This is true for a number of reasons, the first being that synced files

3 0
3 years ago
If you want to selectively darken an area of an image you could use the
DerKrebs [107]
Create an adjustment layer and create a hue and saturation layer. You'll see sliders so adjust them to your liking. next select a layer mask and fill it will black. then select which areas you want to darken and use the wand tool. Apply a gradient mask if you want. 
5 0
3 years ago
The ____ is the ranking executive on-site when the crisis or emergency arises, who is authorized to initiate the CM plan.
aleksklad [387]

The answer is the Executive-in charge

The concept of an Executive-in charge came from the military’s chain of command. A chain of command ranges from a supervisor to the top executive of the organization. When a crisis arises, it is possible that one or more of the senior top managers may not be available for consultations because of the travel-intensive positions.






7 0
3 years ago
Read 2 more answers
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