diff --git a/SolarPower/Repository/Implement/OverviewRepository.cs b/SolarPower/Repository/Implement/OverviewRepository.cs
index 8dca441..cc6fece 100644
--- a/SolarPower/Repository/Implement/OverviewRepository.cs
+++ b/SolarPower/Repository/Implement/OverviewRepository.cs
@@ -734,7 +734,7 @@ namespace SolarPower.Repository.Implement
                             sql = $@"  select left(c.`TIMESTAMP`, 4) AS `TIMESTAMP`, sum(monthKWH) AS KWH,  round(AVG(PR), 2) AS PR , round(AVG(PR), 2) AS avgPR   , 
 	                                            ifnull(avg( P.IrrDay), 0) irrDay, avg(P.Temperature) AS Temp
 			                           FROM power_station_history_month C  
-                                            LEFT JOIN sensor_history_month P ON DATE_FORMAT(P.TIMESTAMP, '%Y') = DATE_FORMAT(C.TIMESTAMP, '%Y') AND P.PowerStationId = C.PowerStationId
+                                            LEFT JOIN sensor_history_month P ON DATE_FORMAT(P.TIMESTAMP, '%Y-%M') = DATE_FORMAT(C.TIMESTAMP, '%Y-%M') AND P.PowerStationId = C.PowerStationId
 				                           WHERE C.PowerStationId = {post.PowerstationId}  
 				                           group by left(c.`TIMESTAMP`, 4)   "; 
                             break;