Я думаю это даст вам то, что вы хотите, но это странное требование.
(SELECT DISTINCT EmpId, DeptCheck WHERE DeptCheck IS NOT NULL) D
FULL OUTER JOIN
(SELECT DISTINCT EmpId, VehicleCheck WHERE VehicleCheck IS NOT NULL) V
ON D.EmpID = V.EmpID
FULL OUTER JOIN
(SELECT DISTINCT EmpId, LocationCheck WHERE LocationCheck IS NOT NULL) L
ON L.EmpID = D.EmpID