412. Department Headcount Growth

Medium HR Analytics Workforce Analytics

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 yearly_hires AS (SELECT strftime('%Y', hire_date) AS hire_year, COUNT(*) AS new_hires FROM employees GROUP BY hire_year) SELECT hire_year, new_hires, SUM(new_hires) OVER (ORDER BY hire_year) AS cumulative_headcount FROM yearly_hires ORDER BY hire_year;

SQL Editor

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Console Output

Console Terminal

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