[Solved] Given the following SQL query, what will be the output?WITH numbers AS (SELECT 1 AS num UNION ALL SELECT 2 UNION ALL SELECT 3) SELECT SUM(num) FROM numbers; | SQL

SQL - Common Table Expressions (CTEs)

Given the following SQL query, what will be the output?

WITH numbers AS (SELECT 1 AS num UNION ALL SELECT 2 UNION ALL SELECT 3) SELECT SUM(num) FROM numbers;

A1

B3

CSyntax error

D6

Step-by-Step Solution

Solution:

Step 1: Understand the CTE content
The CTE named 'numbers' contains rows with values 1, 2, and 3.
Step 2: Calculate the SUM of num column
Sum of 1 + 2 + 3 equals 6.
Final Answer:
6 -> Option D
Quick Check:
1 + 2 + 3 = 6 [OK]

Quick Trick: Sum values inside CTE to get result [OK]

Common Mistakes:

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