变量导出1

fiveep-persistence/src/main/resources/mapper/mysql/DeviceAnalogVariableListMapper.xml

@@ -56,8 +56,8 @@
         c.monitor_device_name
         FROM
         device_analog_variable_list AS a
-        JOIN device AS b ON a.communication_equipment = b.id
-        JOIN device_attribute AS c ON a.monitoring_equipment = c.id
+        left JOIN device AS b ON a.communication_equipment = b.id
+        left JOIN device_attribute AS c ON a.monitoring_equipment = c.id
         <where>
             a. STATUS = 1
             AND b. ENABLE = 1