Not with a TDBEdit. Databound controls are typically linked to one single record (the current record in the dataset); using them the typical workflow is: add new record - enter data for this record - post the record to the dataset.
You have to use an unbound TEdit in your case and dissect its content in code, e.g. when the user leaves the control (OnExit event), or when he pushes a button.
Pseudo code:
var
LList: TStringlist;
N, LValue: integer;
begin
LList := TStringlist.Create;
try
LList.StrictDelimiter := True;
LList.Commatext := Edit1.Text;
for N:= 0 to LLIst.Count - 1 do begin
if TryStrToInt(Trim(LList[N]), LValue) then begin
add record to dataset
store LValue into the dataset field
post the record
end; {if}
end; {for}
finally
LList.Free;
end;
end;