update：请求合并

ZhuDongming

2019-11-21 154b73d12f9e39039fc7b099beab3881c94b2d8d

 src/main/resources/mapper/DeviceMapper.xml

@@ -414,4 +414,8 @@
         </if>
      )
   </select>
	
   <select id="getLimitDataByDevice" resultType="String">
      SELECT limit_val FROM view_device_density WHERE mac = #{mac}
   </select>
</mapper>