SELECT 
    COALESCE(data.roundtime, 'N/A') AS StartTimestamp,
    COALESCE(
        CONCAT(
            'H',
            TIMESTAMPDIFF(
                HOUR,
                DATE_FORMAT(data.roundtime, "%Y-%m-%d %H:00:00"),
                DATE_FORMAT(NOW(), "%Y-%m-%d %H:00:00")
            )
        ),
        'N/A'
    ) AS Hour,
    COALESCE(data.sScanner_Name, 'N/A') AS sScanner_Name,

    COALESCE(data.BadReads, 0)     AS BadReads,
    COALESCE(data.GoodReads, 0)    AS GoodReads,
    COALESCE(data.MultiReads, 0)   AS MultiReads,
    COALESCE(data.NoData, 0)       AS NoData,
    COALESCE(data.NoReads, 0)      AS NoReads,
    COALESCE(data.Total, 0)        AS Total

FROM (SELECT 1) AS p
LEFT JOIN (
    SELECT 
        CONCAT(DATE(t_stamp), ' ', HOUR(t_stamp), ':00') AS roundtime,
        'S03aa' AS sScanner_Name,

        -- Real counts from item_data
        SUM(CASE WHEN adiSort_Code_0 NOT IN (0, 8, 9, 10, 11, 15) THEN 1 ELSE 0 END) AS BadReads,
        SUM(CASE WHEN adiSort_Code_0 = 0  THEN 1 ELSE 0 END) AS GoodReads,
        SUM(CASE WHEN adiSort_Code_0 = 10 THEN 1 ELSE 0 END) AS MultiReads,
        SUM(CASE WHEN adiSort_Code_0 = 9  THEN 1 ELSE 0 END) AS NoData,
        SUM(CASE WHEN adiSort_Code_0 = 8  THEN 1 ELSE 0 END) AS NoReads,

        -- Total scans in this bucket
        COUNT(*) AS Total

    FROM item_data
    WHERE t_stamp BETWEEN :starttime AND :endtime
      AND adiSort_Code_0 NOT IN (11, 15)
      AND sLocation_ID LIKE 'S03%'
      AND (:scannername IS NULL OR :scannername = '' OR :scannername = 'S03aa')

    GROUP BY DATE(t_stamp), HOUR(t_stamp)
) AS data ON 1=1
ORDER BY data.roundtime ASC;