[Solved] Given the function below, what will be the output of SELECT add_one(5);? CREATE FUNCTION add_one(x integer) RETURNS integer AS $ BEGIN RETURN x + 1; END; $ LANGUAGE plpgsql; | PostgreSQL

PostgreSQL - PL/pgSQL Fundamentals

Given the function below, what will be the output of SELECT add_one(5);?

CREATE FUNCTION add_one(x integer) RETURNS integer AS $$ BEGIN RETURN x + 1; END; $$ LANGUAGE plpgsql;

A6

BSyntax error

C5

DNULL

Step-by-Step Solution

Solution:

Step 1: Understand the function logic
The function takes an integer input x and returns x + 1.
Step 2: Apply the input value 5
Calling add_one(5) returns 5 + 1 = 6.
Final Answer:
6 -> Option A
Quick Check:
Input 5 plus 1 equals 6 [OK]

Quick Trick: Function adds 1 to input, so 5 becomes 6 [OK]

Common Mistakes:

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Given the function below, what will be the output of SELECT add_one(5);?