Update and Update_RecordSet Code sample in Ax 2012

 TestTable TestTable;  
   

//Update_Recordset

update_recordset TestTable setting Name ="New Enterprises" where TestTable.Accountnum =="uS-027";  
   

//Update

ttsBegin;  
   while select forupdate TestTable where TestTable.Accountnum =="uS-027"  
   {  
     TestTable.Name ="New Enterprises";  
     TestTable.update();  
   }  
   ttsCommit;  
   info("OK");