--- a/exportData.csv.php
+++ b/exportData.csv.php
@@ -10,7 +10,7 @@
  case when "supplierABN" != 0 THEN "supplierABN"::text ELSE "supplierName" END) as supplierID,
  
 (\'https://www.tenders.gov.au/?event=public.advancedsearch.keyword&keyword=CN\'::text || "CNID"::text) as sourceURL 
-FROM contractnotice join agency on contractnotice."agencyName"=agency."agencyName" where "childCN" = 0'
+FROM contractnotice join agency on contractnotice."agencyName"=agency."agencyName" where "childCN" is null'
 , array(PDO::ATTR_CURSOR => PDO::FETCH_ORI_NEXT));
 // "supplierCity","supplierPostcode","supplierCountry","contactPostcode",
 // (substr( "categoryUNSPSC"::text, 0, 2 ) || \'0000000\'::text) as "categoryUNSPSClv1", "categoryUNSPSC", (substr( "categoryUNSPSC"::text, 0, 3 ) || \'000000\'::text) as "categoryUNSPSClv2" "categoryUNSPSC", (substr( "categoryUNSPSC"::text, 0, 4 ) || \'00000\'::text as "categoryUNSPSClv3")