[Solved] Which statement correctly describes when to use RETURN NEXT in a PostgreSQL function? — Ans: When you want to return multiple rows one by one from a set-returning function. | PostgreSQL

PostgreSQL - PL/pgSQL Fundamentals

Which statement correctly describes when to use RETURN NEXT in a PostgreSQL function?

AWhen you want to return multiple rows one by one from a set-returning function.

BWhen you want to return a single scalar value and end the function immediately.

CWhen you want to raise an error inside the function.

DWhen you want to commit a transaction inside the function.

Step-by-Step Solution

Solution:

Step 1: Identify purpose of RETURN NEXT
RETURN NEXT is used to add rows to the output of a set-returning function.
Step 2: Match use case
Returning multiple rows one by one fits the use of RETURN NEXT.
Final Answer:
Use RETURN NEXT to return multiple rows from a function -> Option A
Quick Check:
Use case for RETURN NEXT = When you want to return multiple rows one by one from a set-returning function. [OK]

Quick Trick: Use RETURN NEXT to add rows in set-returning functions [OK]

Common Mistakes:

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Which statement correctly describes when to use RETURN NEXT in a PostgreSQL function?