UPDATE journeys
SET purpose =
CASE
	WHEN id mod 2 = 0 THEN
    'Medical'
    WHEN id mod 3 = 0 THEN
	'Technical'
    WHEN id mod 5 = 0 THEN
	'Educational'
    WHEN id mod 7 = 0 THEN
	'Military'
    ELSE
    purpose
END