Advance ranges example in MSD axapta

Advance ranges example in axapta

 SysQuery query;  
 SysQueryRun queryRun;  
 QueryBuildDataSource custInvoiceJourDS, custInvoiceTransDS;  
 ;  
 query = new Query();  
 custInvoiceJourDS = query.addDataSource(tablenum(CustInvoiceJour));  
 custInvoiceJourDS.addRange(fieldnum(CustInvoiceJour, InvoiceAccount));  
 custInvoiceJourDS.addRange(fieldnum(CustInvoiceJour, CurrencyCode));  
 custInvoiceTransDS = custInvoiceJourDS.addDataSource(tablenum(CustInvoiceTrans));  
 custInvoiceTransDS.addRange(fieldnum(CustInvoiceTrans, ItemId));  
 custInvoiceTransDS.relations(true);  
 queryRun = new SysQueryRun(query);  
 queryRun.prompt();