WITH RSV_NOW AS (
    SELECT 
        LINE_ID,
        SEAT_NO,
        LEAD(SEAT_NO, 1) OVER (PARTITION BY LINE_ID ORDER BY SEAT_NO) AS NEXT_SEAT1,
        LEAD(SEAT_NO, 2) OVER (PARTITION BY LINE_ID ORDER BY SEAT_NO) AS NEXT_SEAT2,
        RSV_STATUS,
        LEAD(RSV_STATUS, 1) OVER (PARTITION BY LINE_ID ORDER BY SEAT_NO) AS NEXT_STATUS1,
        LEAD(RSV_STATUS, 2) OVER (PARTITION BY LINE_ID ORDER BY SEAT_NO) AS NEXT_STATUS2
    FROM 
        SEAT_RESERVE
)
SELECT
    LINE_ID     AS LINE,
    SEAT_NO     AS SEAT_F,
    NEXT_SEAT2  AS SEAT_T
FROM
    RSV_NOW
WHERE
    RSV_STATUS = '0'
    AND NEXT_STATUS1 = '0'
    AND NEXT_STATUS2 = '0'
ORDER BY 
    LINE_ID DESC, 
    SEAT_NO ASC;