The operators used when a subquery returns multiple rows to be evaluated in comparison to the outer query are _______

MySQL - Quiz(MCQ)

IN and NOT IN

EXISTS and NOT EXISTS

LEFT JOIN and RIGHT JOIN

OUTER JOIN and INNER JOIN

Correct Answer : IN and NOT IN

Explanation : When there is a need to evaluate multiple rows in comparison to the outer query, the ‘IN’ and ‘NOT IN’ operators are used. They are used for testing whether a comparison value is present in a set of values.

Recently Updated in MySQL Questions

What is the shebang line?

Correct Answer : #!

Explanation : The Perl scripts are text files, which can be ceated using any text editor. All Perl scripts generally begin with a #! (shebang) line. A script is a file containing a sequence of commands.

The line that is written at the top of the script to write a Perl script using CGI.pm is ______

use CGI

put CGI

include CGI

use this CGI

Correct Answer : use CGI

Explanation : In order to write a Perl script that uses the ‘CGI.pm’ module, a ‘use CGI’ statement is included near the beginning of the script that imports the function names of the module.

What does CGI stand for?

Computer Gateway Interface

Computer Generated Interface

Common Generated Interface

Common Gateway Interface

Correct Answer : Common Gateway Interface

Explanation : The ‘CGI.pm’ module is so called because it helps write scripts that use the ‘Common Gateway Interface’ protocol which defines how a web server communicates with other programs.