Đánh giá thời lượng sạc

SELECT
    user_id,
    charging_station_id,
    charging_duration * 60,
	
    -- Find the cumulative distribution of records in the result set
    ___ ___(
      
      	-- Segment records by charging station id
        ___
      	
      	-- Create the cumulative distribution using charging duration
        ___
      
    ) AS charging_duration_dist

FROM ELECTRIC_VEHICLES.charging
ORDER BY charging_station_id, charging_duration_dist;