空值判断

sms_water/src/main/resources/mapper/DeviceParmMapper.xml

@@ -319,7 +319,7 @@
         ) as tab
     </select>
     <select id="findAlarmCountTotalCount" resultType="com.huaxu.dto.ParmTypeCountDto">
-        select count(1) as "totalCount" ,sum(tab.nbnormalCount) as "nbnormalCount" from(
+        select count(1) as "totalCount" ,ifnull(sum(tab.nbnormalCount),0) as "nbnormalCount" from(
         select a.PARENT_SCENE_ID,case when count(c.id)>0 then 1 else 0 end  as "nbnormalCount"
         from sms_device_scene a
         INNER JOIN sms_device_parm b on a.DEVICE_ID=b.DEVICE_ID and b.PARM_TYPE in (15,8,9,11,18,19)