ALTER TABLE hot_driver
    ADD COLUMN vehicle_ids VARCHAR(1000) NULL COMMENT '已绑定车辆ID集合，多个以逗号分隔' AFTER vehicle_id;

UPDATE hot_driver
SET vehicle_ids = NULLIF(TRIM(vehicle_id), '')
WHERE vehicle_ids IS NULL
  AND vehicle_id IS NOT NULL;

UPDATE hot_driver
SET vehicle_id = NULLIF(SUBSTRING_INDEX(vehicle_ids, ',', 1), ''),
    plate_number = NULLIF(SUBSTRING_INDEX(plate_number, ',', 1), '');

ALTER TABLE hot_driver
    DROP COLUMN current_page_vehicle_id;