--- a/displayAgency.php
+++ b/displayAgency.php
@@ -66,7 +66,7 @@
 agenciesGraph();
   $query = 'SELECT SUM("value"), "agencyName"
 FROM contractnotice
-WHERE "childCN" = 0
+WHERE "childCN" is null 
 GROUP BY "agencyName" ';
 $query = $conn->prepare($query);
 	$query->execute();