Free Online Firebird 4.0 (Employee) Playground: Practice & Master SQL Skills

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WITH RECURSIVE employee_hierarchy (employee_id, department_id) AS ( -- Начальный запрос: ищем Роберта Нельсона SELECT e.employee_id, e.department_id FROM EMPLOYEE WHERE first.name = 'Robert Nelson' UNION ALL -- Рекурсивно добавляем подчиненных SELECT e.employee_id, e.department_id FROM EMPLOYEE JOIN employee_hierarchy eh ON e.manager_id = eh.employee_id ) SELECT DISTINCT d.department_id, d.department_name FROM employee_hierarchy eh JOIN DEPARTMENT d ON eh.department_id = d.department_id; ; SELECT 'Last_query_cost' AS "Variable_name", 0 AS "Value" FROM RDB$DATABASE;

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