怎么用?立等(10分)

我想把 sql.add('select sum(a),sum(b) from xxxx') 得出的结果赋值给两个变量x1,x2,怎么用?

with AdoQuery1 do
begin
Close;
Sql.Clear;
Sql.add('select sum(a) as T1,sum(b) as T2 from xxxx');
Open;
end;

x1:=AdoQuery1.FieldByName('T1').AsInteger;
x2:=AdoQuery1.FieldByName('T2').AsInteger;
是这个意思吧！

谢谢!!!!!!!