List<new_namespace__Account_Histroy__c> result=[select new_namespace__Account_Id__c,Count(Name) Name ,new_namespace__Account_Owner_New__c,new_namespace__Account_Owner_Old__c,
                                        new_namespace__Name_New__c,new_namespace__Name_Old__c,new_namespace__Account_Number_New__c,new_namespace__Account_Number_Old__c,new_namespace__Account_Website_New__c,
                                        new_namespace__Account_Website_Old__c,FORMAT(new_namespace__Modified_By_New__c) ModifyN,FORMAT(new_namespace__Modified_By_Old__c) ModifyO from new_namespace__Account_Histroy__c
                                        group By FORMAT(new_namespace__Modified_By_Old__c) ModifyO
                                        ];

update button click then textfield will be editable and when we put a value on it the record automatically update ..
when delete a record a popup box show when we click on yes then the record list does not refresh ..howww