Tối ưu lịch sạc

SELECT
    charger_type,
    charging_duration * 60 AS charging_minutes,
	
    -- Assign a ranking to reach record based on charging
    -- duration, from shortest to longest
    ___() ___(
      	-- Segment the result set by charger type
        ___ ___ ___
        ORDER BY ___
    ) AS ___

FROM ELECTRIC_VEHICLES.charging;