数据库 Select sum as From 问题

按照下列方式查询数据库，当没有对应订单编号，rsa.eof也不是为空，请问如何判断是否有记录？？

Set rsa = Server.CreateObject("ADODB.Recordset")
Sqlstra = "Select sum(money) as inv_total From 訂單_資料 where 訂單編號 = '" & rs("訂單編號") &"'"
rsa.Open Sqlstra,conn,1,1

if rsa.bof and rsa.eof then response.write "no record."

rsa.recordcount<0没有记录