SELECT e.EMPLOYEE_ID,COUNT(e2.EMPLOYEE_ID)
FROM employees AS e
JOIN
employees AS e2
ON e.MANAGER_ID != e2.EMPLOYEE_ID
WHERE e.HIRE_DATE < e2.HIRE_DATE
GROUP BY e.EMPLOYEE_ID;
SELECT e.EMPLOYEE_ID,COUNT(e2.EMPLOYEE_ID)
FROM employees AS e
JOIN
employees AS e2
ON e.MANAGER_ID != e2.EMPLOYEE_ID
WHERE e.HIRE_DATE < e2.HIRE_DATE
GROUP BY e.EMPLOYEE_ID;
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