​If It Is Possible for a Subquery to Return a NULL

question 45

Multiple Choice

​If it is possible for a subquery to return a NULL value to the outer query for comparison,the ____ function should be used to substitute an actual value for the NULL.

• A) ​IS NULL
• B) ​NVL
• C) ​!NVL
• D) ​NVLS

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Definitions:

Performance Management Systems

Frameworks used by organizations to monitor, review, and manage the performance of employees and ensure the achievement of strategic objectives.

Harsh and Judgmental

Describes a critical and severe way of thinking or forming opinions about others, often without understanding or compassion.

Goal Setting

The process of identifying something that one aims to achieve and establishing measurable objectives and timeframes to accomplish it.

Efficiency;Effectiveness

Efficiency refers to accomplishing something with the least waste of time and effort; effectiveness is about achieving the intended or desired result.