我现在在C++中如何得到这个查询获得的求和结果呢？,向大侠请教？

Question

sql="select isnull (sum(cast(NumBer as float)),0) from Thing where Part="+item+"and Type ='测试' and Data >="+ TimeEnd+" and Data <= "+ TimeStare;
_bstr_t bstr_t(sql.c_str());
m_pRecordset=record.GetRecordset(bstr_t);
_variant_t ThePart;

Answer 1

直接获取值就行了 ThePart=m_pRecordset->GetCollect("");

Answer 2

OTL连接数据库