diff --git a/src/main/java/org/gcube/dataanalysis/ecoengine/evaluation/DiscrepancyAnalysis.java b/src/main/java/org/gcube/dataanalysis/ecoengine/evaluation/DiscrepancyAnalysis.java
index 05d4fbf..ea132fa 100644
--- a/src/main/java/org/gcube/dataanalysis/ecoengine/evaluation/DiscrepancyAnalysis.java
+++ b/src/main/java/org/gcube/dataanalysis/ecoengine/evaluation/DiscrepancyAnalysis.java
@@ -24,7 +24,7 @@ public class DiscrepancyAnalysis extends DataAnalysis {
 //	static String discrepancyQuery = "select distinct a.%1$s as csquareone,b.%2$s as csquaretwo,a.%3$s as firstprob,b.%4$s as secondprob from (select * from %5$s order by %1$s limit %7$s) as a inner join (select * from %6$s order by %2$s limit %7$s)  as b on a.%1$s=b.%2$s and (a.%3$s<>b.%4$s)";
 	static String discrepancyQuery = "select distinct a.%1$s as csquareone,b.%2$s as csquaretwo,a.%3$s as firstprob,b.%4$s as secondprob from " +
 			"(select csquarecode,sum(%3$s) as %3$s from (select distinct * from %5$s order by %1$s limit %7$s) as aa group by %1$s) as a " +
-			"inner join " +
+			"left join " +
 			"(select csquarecode,sum(%4$s) as %4$s from (select distinct * from %6$s order by %2$s limit %7$s) as aa group by %2$s) as b " +
 			"on a.%1$s=b.%2$s and (a.%3$s<>b.%4$s)";