In the relational model, what is the term used to describe the header or definition of a table specifying its name and attributes? MCQ with Answer and Explanation
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Question #1
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Which clause is used in a SQL SELECT statement to organize matching rows into summary groups based on one or more columns?
Correct Answer: Option B
Explanation:
The GROUP BY clause groups rows that have the same values into summary rows, often used alongside aggregate functions like COUNT(), MAX(), or AVG().
The GROUP BY clause groups rows that have the same values into summary rows, often used alongside aggregate functions like COUNT(), MAX(), or AVG().
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Computer
Database Management System (DBMS)
Question #2
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Which SQL keyword is used to give users permission to access database objects?
Correct Answer: Option A
Explanation:
GRANT is a DCL command used to assign privileges to users.
GRANT is a DCL command used to assign privileges to users.
This question belongs to:
Computer
Database Management System (DBMS)
Question #3
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Any set of one or more attributes that collectively allow us to uniquely identify tuples in a relation is termed as a what?
Correct Answer: Option C
Explanation:
A Super Key is any set of attributes within a table that can uniquely identify a row. A candidate key is a minimal super key.
A Super Key is any set of attributes within a table that can uniquely identify a row. A candidate key is a minimal super key.
This question belongs to:
Computer
Database Management System (DBMS)
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