[Solved] What will be the result of executing the following function call?CREATE FUNCTION square(x integer) RETURNS integer AS $ BEGIN RETURN x * x; END; $ LANGUAGE plpgsql; SELECT square(4); | PostgreSQL

PostgreSQL - PL/pgSQL Fundamentals

What will be the result of executing the following function call?

CREATE FUNCTION square(x integer) RETURNS integer AS $$ BEGIN RETURN x * x; END; $$ LANGUAGE plpgsql; SELECT square(4);

A16

B8

CError: function not found

DNULL

Step-by-Step Solution

Solution:

Step 1: Analyze the function logic
The function returns the square of the input integer by multiplying it by itself.
Step 2: Calculate the output for input 4
4 * 4 equals 16, so the function returns 16.
Final Answer:
16 -> Option A
Quick Check:
Function square(4) = 16 [OK]

Quick Trick: Multiplying input by itself returns square [OK]

Common Mistakes:

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What will be the result of executing the following function call?