I am working on Oracle database 11g, and facing an issue while trying to execute the following query: SELECT d.department_name, e.manager_id, l.location_id, sum(e.salary) FROM departments d, employees e, locations l WHERE d.department_id = e.department_id AND e.manager_id = d.manager_id (+) AND l.location_id = d.location_id (+) GROUP BY ...
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