从A表中选取数据列表到B表中然后统计选取的数据字段总行值的sql语句

SQL语句挑选数据值：

SELECT COUNT(table_new.c) AS `totalCount` FROM
(SELECT 
  `deviceId` AS `hotspot.deviceId`,
  COUNT(`count`) AS `c` 
FROM
  `t_hotspot_log` 
WHERE `sceneId` = 2 
  AND `deleted` = 0 
  AND `createdTime` >= "2017-01-01 00:00:00" 
  AND `createdTime` <= "2017-08-02 10:00:00" 
GROUP BY `deviceId`)table_new

其中，挑选出的数据如下图所示：

执行完上述整体sql语句后统计的totalCount如下图所示：