7 years ago in Database Management System

A field or a combination of fields that has a unique value is called :

[A] Foreign key
[B] Secondary key
[C] Primary key
[D] Alternate key
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Answers

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muhandweam
muhandweam - 1 week ago

muhandweam from Iraq is saying Foreign key is correct answer

Zachery Chen
Zachery Chen - 1 month ago

Zachery Chen from Taiwan is saying Primary key is correct answer

Shourya Singh Rawat
Shourya Singh Rawat - 4 years ago

Shourya Singh Rawat from India is saying Primary key is correct answer

Padmapriya
Padmapriya - 4 years ago

Padmapriya from Chennai, India is saying Primary key is correct answer

Mihir Shah
Mihir Shah - 4 years ago

Mihir Shah from Majalgaon, India is saying Primary key is correct answer

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What is the result of the following SQL statement ?
SELECT A.Employee_Name, B.Spouse_Name
FROM Employee A LEFT OUTER JOIN Spouse B
ON A. Employee_ID = B.Employee_ID

  • [A] A list of employee�??s spouses
  • [B] A list of all employees that have spouses, with spouse names included in the list
  • [C] A list of all employee�??s names, including the name of their spouse if they have one
  • [D] Two lists : One list of employees, the other of spouses