Error Number: 2006

MySQL server has gone away

SELECT `b`.`campus_id`, `b`.`campus_name`, `a`.`faculty_id`, `a`.`faculty_name`, `c`.* FROM (`pu_faculty` as a, `pu_campus` as b, `pu_department` as c) WHERE `c`.`faculty_id` = a.faculty_id AND `a`.`campus_id` = b.campus_id AND `a`.`status` = 'Active' AND (c.department_id = '59' OR c.dept_code = '59')