SELECT "SPOOLER_ID" AS "JOB_SCHEDULER", "JOB_CHAIN", 
       "ORDER_ID", COUNT(*) AS "ORDER_COUNT", 
       SUM("END_TIME"-"START_TIME") AS "ELAPSED"
  FROM SCHEDULER_ORDER_HISTORY s
 WHERE "START_TIME" >= DATE_SUB(CURRENT_DATE, INTERVAL 10 DAY)
   AND IFNULL(DATE("END_TIME"), DATE_SUB(CURRENT_DATE, INTERVAL 1 DAY)) <= CURRENT_DATE
 GROUP BY 1, 2, 3;