Database Management Systems (DBMS)
Which of the following best describes Foreign key?
Difficulty: Medium
About this MCQ
This Medium Database Management Systems (DBMS) question asks: Which of the following best describes Foreign key? The correct choice is B. A column that creates a link between data in two tables by referencing a primary key in another table.. Read the options below, commit to one, then use the explanation to see why that choice holds and why the others do not.
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- A. A minimal set of attributes that can uniquely identify a record in a table.
Why not A: “A minimal set of attributes that can uniquely identify a record in a table.” does not fit this question. The answer is A column that creates a link between data in two tables by referencing a primary key in another table..
- B. A column that creates a link between data in two tables by referencing a primary key in another table. ✓
- C. The process of intentionally introducing redundancy into a database to improve read performance.
Why not C: “The process of intentionally introducing redundancy into a database to improve read performance.” does not fit this question. The answer is A column that creates a link between data in two tables by referencing a primary key in another table..
- D. A database structure that improves the speed of data retrieval operations on a table.
Why not D: “A database structure that improves the speed of data retrieval operations on a table.” does not fit this question. The answer is A column that creates a link between data in two tables by referencing a primary key in another table..
Correct answer
B. A column that creates a link between data in two tables by referencing a primary key in another table.
Explanation
A column that creates a link between data in two tables by referencing a primary key in another table is the term that matches Which of the following best describes Foreign key option B Option A A minimal set of attributes that can uniquely identify a record in a table does not fit this question Option C The process of intentionally introducing redundancy into a database to improve read performance does not fit this question Option D A database structure that improves the speed of data retrieval operations on a table does not fit this question For this Database Management Systems DBMS question the accepted answer is A column that.
Source: Database Management Systems (DBMS) Official Reference Guide
Tags: computer science, dbms, SQL, databases
Submitted by: MCQsHub Editorial
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