diff --git a/src/main/java/com/techsor/datacenter/sender/dao/DeviceDao.java b/src/main/java/com/techsor/datacenter/sender/dao/DeviceDao.java
index 1fbcacb..383f958 100644
--- a/src/main/java/com/techsor/datacenter/sender/dao/DeviceDao.java
+++ b/src/main/java/com/techsor/datacenter/sender/dao/DeviceDao.java
@@ -80,11 +80,18 @@ public class DeviceDao {
             }
             case "basic_monitoring_asset":{
                 try{
-                    String sql="select basic_monitoring_asset.*,basic_asset_class_big.class_name as classBigName,basic_asset_class_medium.class_name as classMediumName,basic_asset_class_small.class_name as classSmallName from  " +
-                            "basic_monitoring_asset,basic_asset_class_big,basic_asset_class_medium,basic_asset_class_small where basic_monitoring_asset.equipment_id ="+id+" and basic_monitoring_asset.class_big_id = basic_asset_class_big.id" +
-                            " and basic_monitoring_asset.class_medium_id = basic_asset_class_medium.id " +
-                            " and basic_monitoring_asset.class_small_id = basic_asset_class_small.id ";
-                    resultList=this.jdbcTemplate.query(sql,(rs,rowNum)->{
+                    String sql =
+                            "SELECT " +
+                                    "a.*, " +
+                                    "b.class_name AS classBigName, " +
+                                    "c.class_name AS classMediumName, " +
+                                    "d.class_name AS classSmallName " +
+                                    "FROM basic_monitoring_asset a " +
+                                    "LEFT JOIN basic_asset_class_big b ON a.class_big_id = b.id " +
+                                    "LEFT JOIN basic_asset_class_medium c ON a.class_medium_id = c.id " +
+                                    "LEFT JOIN basic_asset_class_small d ON a.class_small_id = d.id " +
+                                    "WHERE a.equipment_id = ?";
+                    resultList=this.jdbcTemplate.query(sql,new Object[]{id},(rs,rowNum)->{
                         UdfCommonJsonInfo commonJsonInfo = new UdfCommonJsonInfo();
                         UdfAssetInfo udfAssetInfo=new UdfAssetInfo();
                         udfAssetInfo.setId(rs.getString("udf_equipment_id"));