Which type of JOIN returns all matching rows from both tables, plus all unmatched rows from the left table with NULL values filled in for the right table columns? MCQ with Answer and Explanation
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Question #1
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What is the default sorting order when using the ORDER BY clause in an SQL statement?
Correct Answer: Option C
Explanation:
By default, the ORDER BY clause sorts the query results in ascending order unless specified otherwise using the DESC keyword.
By default, the ORDER BY clause sorts the query results in ascending order unless specified otherwise using the DESC keyword.
This question belongs to:
Computer
Database Management System (DBMS)
Question #2
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The total number of tuples (rows) contained within a relational database table is called its what?
Correct Answer: Option B
Explanation:
The number of tuples or rows in a relation is defined as the cardinality of that relation.
The number of tuples or rows in a relation is defined as the cardinality of that relation.
This question belongs to:
Computer
Database Management System (DBMS)
Question #3
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In the relational model, what is the term used to describe the header or definition of a table specifying its name and attributes?
Correct Answer: Option C
Explanation:
A Relation Schema defines the structure of a relation, specifying its name and the list of attributes along with their data types.
A Relation Schema defines the structure of a relation, specifying its name and the list of attributes along with their data types.
This question belongs to:
Computer
Database Management System (DBMS)
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