Can you do it in Javascript?Here's some code, don't know if they syntax is correct but this should get you what you're looking for:var exceptionTable;for each (var item in tableA) {   if(item.tableBList == null) {         exceptionTable.add(item);   ...

Vignesh,If this is a ServiceNow table:Then I agree with Ben that modifying the original table could create all kinds of problems you might not catch early on.Ben or Ahmed have great approaches to finding those fieldsIf this is a Datasource table:As y...