string sql = "select * from product where pro_name='product'and classid in (select CInt(id) from class where first like (select first from class where id=CInt("+Request.QueryString["id"].ToString()+")))";
注意:
在ACCESS中
字段 数据类型
classid 文本
id 自动编号
记住:在ACCESS中,自动编号数据类型是Int.