Here is the computed column example in view which return Yes/No based on if condition /// <summary> /// </summary> /// return Yes if External Customer has attachment else No /// </summary> public static server str computeFileAttached() { str customerRecID; str fileAttached; str result; SysDictTable dictDocuRef = new SysDictTable(tableNum(DocuRef)); customerRecID=SysComputedColumn::returnField(tableStr(TestExtCustomerView), identifierStr(TestExtCustomerTable), fieldStr(TestExtCustomerTable, RecId)); str s = strFmt('SELECT TOP 1 %1 FROM %2 WHERE %2.%3 = %4 AND %2.%5 = %6', dictDocuRef.fieldName(fieldNum(DocuRef, RefRecId), DbBackend::Sql), dictDocuRef.name(DbBackend::Sql), dictDocuRef.fieldName(fieldNum(DocuRef, RefRecId), DbBackend::Sql),customerRecID, dictDocuRef.fieldName(fieldNum(DocuRef,RefTableId),DbBackend::Sql),"9708"); result = strFmt('ISNULL((%1), \'\')', s); return SysComputedColumn::if( SysComputedColumn::returnLiteral(...