Microsoft Microsoft Interview Question 10

Storage
Usage
by Subscription

Calculate total storage used per subscription plan.

Table Schema

Inspect
Table

interactive

Sample Data

Sample Input: storage

Expected Output

SQL Editor

Waiting for query

Hints

Hint 01: Identify the grouping level required by the output.

Hint 02: Aggregate with COUNT, SUM, AVG, or a window function as needed.

Hint 03: Filter after aggregation with HAVING or after ranking with an outer query.

Solution

Solution is locked until you decide to reveal it. Try the editor first, then open this when you want the reference answer.

SELECT plan_type, SUM(storage_used_gb) AS total_storage
FROM storage
GROUP BY plan_type;

Explanation

Read the expected output columns to determine the final grain.

Aggregate or rank the input rows to calculate the requested metric.

Filter, sort, and alias the final columns to match the output.