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nikklg [1K]
4 years ago
5

A database table contains the Group_ID and Group_Name fields. Which field can be the primary key of the table?

Computers and Technology
1 answer:
Alisiya [41]4 years ago
4 0
Answer:
<span>The Group_ID field can be the primary key of the table.

Explanation:
When dealing with databases we need to choose primary key for every table. Primary key is something that uniquely identifies data in that table. It means that primary key can appear only once in that table and for each data it is different.
In our case it is Group_ID. This is field that can easily be made different each time. It is possible that Group_name contains more groups with same name.</span>
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Assign True to the variable has_dups if the string s1 has any duplicate character (that is if any character appears more than on
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Answer:

#include <iostream>

using namespace std;

int main()

{

   string s;

   cin>>s;    //reading string

   int i,j;

   bool has_dups=false;

   int n= s.length();

   for(i=0;i<n;i++)  //to check for duplicate characters

   {

       for(j=0;j<n;j++)

       {

           if(j!=i && s[i]==s[j])  //to check if it is matched with itself

           {

               has_dups=true;  //if true no need to check others

               break;

           }

       }

   }

   cout<<has_dups;

   return 0;

}

OUTPUT :

California

1

Explanation:

Above program finds if a character repeat itself in the string entered by user.

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