SELECT r1.date, e1.id_employees, r1.id_department, s1.id_office, s1.startTime
FROM tbl_schedule as r1
INNER JOIN tbl_calendar AS k1 ON r1.date = k1.date
LEFT JOIN tbl_citydepartmentoffice AS s1 ON (k1.id_cityDepartmentOffice = s1.Id_cityDeparmentOffice AND r1.id_department = s1.id_department)
INNER JOIN tbl_employees AS e1 ON r1.id_employees=e1.id_employees