【DM版本】: DM Database Server 64 V8; DB Version: 0x7000c
【操作系统】：Kylin V10
【CPU】: 海光x86
【问题描述】*：
下面这条sql语句在MySQL下执行正常，请问是having不支持别名操作吗？

SELECT
    count(ww.id)                            AS num,
    sum(if(ww.status IN(12, 13, 9), 1, 0))  AS snum
FROM
    wo_workorder ww
WHERE ww.deleted = 0
group by ww.de_demand_id
HAVING num = snum;