SELECT 
    CONCAT(DATE(t_stamp), ' ', HOUR(t_stamp), ':00') AS `Start Timestamp`,
    CONCAT('H', TIMESTAMPDIFF(HOUR, DATE_FORMAT(t_stamp, "%Y-%m-%d %H:00:00"), DATE_FORMAT(NOW(), "%Y-%m-%d %H:00:00"))) AS `Hour`,
    'S03' AS `Induction Name`,
    '100%' AS `Total Single Carrier`,
    '0%' AS `Total Double Carrier`
FROM item_data
WHERE t_stamp BETWEEN :starttime AND :endtime
    AND adiSort_Code_0 NOT IN (11, 15)
    AND sLocation_ID LIKE 'S03%'
    AND (:inductionname IS NULL OR :inductionname = '' OR :inductionname = 'S03')
GROUP BY DATE(t_stamp), HOUR(t_stamp)
ORDER BY `Start Timestamp` ASC;