407. High-Value Customers (Top 10%)

Hard Marketing Customer Segmentation

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 cust_avg AS (SELECT customer_name, AVG(amount) as avg_spend FROM orders GROUP BY customer_name) SELECT customer_name, avg_spend FROM (SELECT customer_name, avg_spend, NTILE(10) OVER (ORDER BY avg_spend DESC) as decile FROM cust_avg) WHERE decile = 1;

SQL Editor

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Console Output

Console Terminal

Write your query and click "Run Query" (Ctrl + Enter) to see results and testcase validation.