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.CommFaults, 0) AS CommFaults,
    COALESCE(data.GoodReads, 0) AS GoodReads,
    COALESCE(data.MultiItems, 0) AS MultiItems,
    COALESCE(data.MultiReads, 0) AS MultiReads,
    COALESCE(data.NoData, 0) AS NoData,
    COALESCE(data.NoReads, 0) AS NoReads,
    COALESCE(data.BadReads, 0) + 
    COALESCE(data.CommFaults, 0) + 
    COALESCE(data.GoodReads, 0) + 
    COALESCE(data.MultiItems, 0) + 
    COALESCE(data.MultiReads, 0) + 
    COALESCE(data.NoData, 0) + 
    COALESCE(data.NoReads, 0) AS Total
FROM (SELECT 1) AS p
LEFT JOIN (
    SELECT 
        CONCAT(DATE(t_stamp), ' ', HOUR(t_stamp), ':00') AS roundtime,
        sScanner_Name,
        SUM(diScanner_bad_reads) AS BadReads,
        SUM(diScanner_comm_fault) AS CommFaults,
        SUM(diScanner_good_reads) AS GoodReads,
        SUM(diScanner_multi_items) AS MultiItems,
        SUM(diScanner_multi_reads) AS MultiReads,
        SUM(diScanner_no_data) AS NoData,
        SUM(diScanner_no_reads) AS NoReads
    FROM scanner_reads
    WHERE t_stamp BETWEEN :starttime AND :endtime
        AND (sScanner_Name = :scannername OR :scannername IS NULL OR :scannername = '')
    GROUP BY DATE(t_stamp), HOUR(t_stamp), sScanner_Name
    
    UNION ALL
    
    SELECT 
        CONCAT(DATE(t_stamp), ' ', HOUR(t_stamp), ':00') AS roundtime,
        'S03aa' AS sScanner_Name,
        SUM(CASE WHEN adiSort_Code_0 NOT IN (0, 8, 9, 10, 11, 15) THEN 1 ELSE 0 END) AS BadReads,
        0 AS CommFaults,
        SUM(CASE WHEN adiSort_Code_0 = 0 THEN 1 ELSE 0 END) AS GoodReads,
        0 AS MultiItems,
        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
    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;