419. Average Order Value by Quarter

Medium FinTech Time Series Analysis

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

SELECT strftime('%Y', order_date) AS year, ((CAST(strftime('%m', order_date) AS INTEGER) - 1) / 3) + 1 AS quarter, AVG(amount) AS avg_order_value FROM orders GROUP BY year, quarter ORDER BY year, quarter;

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Console Output

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