[Solved] Identify the syntax error in this query:SELECT product, amount, amount / SUM(amount) PARTITION BY product OVER () AS pct_total FROM sales; | SQL

SQL - Advanced Window Functions

Identify the syntax error in this query:

SELECT product, amount, amount / SUM(amount) PARTITION BY product OVER () AS pct_total FROM sales;

AThe PARTITION BY clause must be inside the OVER() parentheses

BSUM() cannot be used with PARTITION BY

CThe division operator is misplaced

DOVER() cannot be empty

Step-by-Step Solution

Solution:

Step 1: Understand window function syntax
PARTITION BY must be inside the OVER() clause.
Step 2: Analyze the query
Query incorrectly places PARTITION BY before OVER().
Step 3: Correct syntax example
SUM(amount) OVER (PARTITION BY product)
Final Answer:
Option A -> Option A
Quick Check:
PARTITION BY goes inside OVER() [OK]

Quick Trick: PARTITION BY inside OVER() parentheses [OK]

Common Mistakes:

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