Database Management Systems (DBMS)
What is the function or purpose of SQL JOIN?
Difficulty: Medium
About this MCQ
This Medium Database Management Systems (DBMS) question asks: What is the function or purpose of SQL JOIN? The correct choice is D. An SQL operation that combines rows from two or more tables based on a related column.. 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 database structure that improves the speed of data retrieval operations on a table.
Why not A: “A database structure that improves the speed of data retrieval operations on a table.” does not fit this question. The answer is An SQL operation that combines rows from two or more tables based on a related column..
- B. A minimal set of attributes that can uniquely identify a record in a table.
Why not B: “A minimal set of attributes that can uniquely identify a record in a table.” does not fit this question. The answer is An SQL operation that combines rows from two or more tables based on a related column..
- C. The process of organizing database tables to reduce data redundancy and improve data integrity.
Why not C: “The process of organizing database tables to reduce data redundancy and improve data integrity.” does not fit this question. The answer is An SQL operation that combines rows from two or more tables based on a related column..
- D. An SQL operation that combines rows from two or more tables based on a related column. ✓
Correct answer
D. An SQL operation that combines rows from two or more tables based on a related column.
Explanation
An SQL operation that combines rows from two or more tables based on a related column is the value that answers What is the function or purpose of SQL JOIN option D Option A A database structure that improves the speed of data retrieval operations on a table does not fit this question Option B A minimal set of attributes that can uniquely identify a record in a table does not fit this question Option C The process of organizing database tables to reduce data redundancy and improve data integrity does not fit this question For this Database Management Systems DBMS question the accepted answer is An SQL operation that.
Source: Database Management Systems (DBMS) Official Reference Guide
Tags: computer science, dbms, SQL, databases
Submitted by: MCQsHub Editorial
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