401. Monthly Sales Growth (MoM)

Medium Startup Growth Metrics

Query Rules

The query columns and order must match the expected result schema.
NULL values should be handled appropriately where applicable.
The grader compares output values and sorting order to evaluate.

Schema Browser

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locations

3 cols

departments

3 cols

employees

6 cols

orders

6 cols

Reference Solution

Expected SQL

WITH monthly_sales AS (SELECT strftime('%Y-%m', order_date) AS month, SUM(amount) AS total_sales FROM orders GROUP BY month) SELECT month, total_sales, (total_sales - LAG(total_sales) OVER (ORDER BY month)) * 100.0 / LAG(total_sales) OVER (ORDER BY month) AS mom_growth FROM monthly_sales;

SQL Editor

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Console Output

Console Terminal

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