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MrRissso [65]
3 years ago
9

The relational database is the primary method for organizing and maintaining data today in information systems. It organizes dat

a in two-dimensional tables with rows and columns called relations. In a database, __________ is used to uniquely identify each record for retrieval or manipulation.
Computers and Technology
1 answer:
levacccp [35]3 years ago
5 0

Answer:

A key field is used to uniquely identify each record for retrieval or manipulation.

Explanation:

In a database there are many, having similar entities. So in order to differentiate each entity from other we need to set a key field among all the field which is always unique for each entity.

For example:

In a database of a company having data about its employees, the key field might be their ID. As some employees can have same names, addresses, phone numbers but cannot have the same ID.

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Analyze the following code. public class Test { public static void main(String[] args) { double radius; final double PI= 3.15169
sergiy2304 [10]

Answer:

The output of the given code as follows:

Output:

Area is: 12.60676

Explanation:

In the given code some information is missing so, the correct code to this question can be described as follows:

Program:

public class Test //defining class  

{

   public static void main(String[] args)//defining the main method

   {

       double radius= 2; //defining double variable radius

       final double PI= 3.15169; //defining double variable PI

       double area = radius * radius * PI; //defining double variable area that calculates values

       System.out.println("Area is: " + area); //print values

   }  

}

Explanation:

  • In the given java code a class "Test" is defined, in which a double variable "radius" is defined, which holds a value, that is 2.
  • In the next step, a double constant variable, that is PI is defined, that holds a value, that is "3.15169".
  • Then another double variable area is defined, that calculates the area value, and prints its value.
4 0
3 years ago
Where does the report footer section appear?
natka813 [3]

The report footer section appears at the bottom of the last page. The correct option is b.

<h3>What is a report footer section?</h3>

The report footer is that contain the report items. It is placed in the last page or the bottom of the report border. It is present only one time exactly at the last page.

Thus, the correct option is b, at the bottom of the last page.

Learn more about report footer section

brainly.com/question/13261774

#SPJ1

3 0
2 years ago
The domain name is passed to a domain name server, which maps it to the correct IP address, and then the code behind the page is
maxonik [38]
It's an incomplete, therefore wrong, description of "<span>B. Browser using a URL to access a web page"

After the nameserver returns the IP address of the domain, the client machine makes the page request from the IP address. The client's browser parses (reads) the HTML code, makes calls to the server for any other files (href, img and media) and displays the HTML content according to visual specifications in the CSS (Cascading Style Sheet).
</span>
6 0
3 years ago
What do you use for soaking hands and holding soapy water​
sertanlavr [38]

Answer

???

Explanation:

Was this a school question?

5 0
3 years ago
Read 2 more answers
Your Web page provides a form for users to add their names to a membership list, stored in a text file. You are writing a progra
vlada-n [284]

Answer:

For the above condition, and as mentioned none of the mode will work, and we need to make use of the JSON format. And we nee to use the JavaScript, and we don't need to mention the mode in JavaScript. Thus, this is nowadays used solution for this old problem that existed when we used to code using c++ and c.

Explanation:

You need to write over this text file, and you also need to read. Hence, you need to open the file with the three privileges, and the append will be required,and this way we can only move line by line. However, this is an old style. Now we save in text file in JSON format. The data collected  from Form is converted to JSON format and written in text file. And as required data can be read or written, and as required.  So if we use only JSON format, then we need not mention the mode, as its not required these days in new languages like JavaScript.

3 0
3 years ago
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