Group by join columns per table

SELECT 
    e.department_id,
    department_name,
    e.job_id,
    job_title,
    COUNT(employee_id)
FROM
    employees e
        INNER JOIN
    departments d ON d.department_id = e.department_id
        INNER JOIN
    jobs j ON j.job_id = e.job_id
GROUP BY e.department_id , e.job_id;
Code language: SQL (Structured Query Language) (sql)

Source: sqltutorial.org

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EneratingSchemaError: Some errors occurred while generating GraphQL schema: Type Query must define one or more fields.
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