復雜sql語句：按部門統計人數

復雜的sql語句，按部門統計人數：

--按部門統計人數
SELECT o.OUGUID AS OUGUID, o.OUNAME AS OUNAME,
IFNULL(COUNT(DISTINCT o.USERGUID), 0) AS USERNUM,
SUM(CASE WHEN IFNULL(q.CALLTIME, 0) != 0 THEN 1 ELSE 0 END) AS CallNoCount, 
SUM(CASE WHEN q.ROW_ID = '1' THEN 1 ELSE 0 END) AS QuestionCount,
SUM(CASE WHEN q.`STATUS` = '3' THEN 1 ELSE 0 END) AS PassCount,
SUM(CASE WHEN q.`STATUS` = '1' OR q.`STATUS` = '2' THEN 1 ELSE 0 END) AS BanjianCount
FROM 
    (SELECT ROW_ID,`STATUS`,handleuserguid,CALLTIME FROM audit_queue UNION ALL
        SELECT ROW_ID,`STATUS`,handleuserguid,CALLTIME FROM audit_queue_history) q 
LEFT JOIN (SELECT o.OUNAME,o.OUGUID,u.USERGUID, u.DISPLAYNAME FROM frame_user u 
                        LEFT JOIN frame_ou o ON u.OUGUID = o.OUGUID) o 
    ON q.handleuserguid = o.USERGUID 
WHERE q.CALLTIME BETWEEN '2018-09-30 00:00:00' AND '2018-10-30 23:59:59'
GROUP BY o.OUGUID;

其中類似 SUM(CASE WHEN q.ROW_ID = '1' THEN 1 ELSE 0 END) AS QuestionCount 為按一定的條件計數；