vc ado 读取oracle为啥很慢？

Question

vc ado 读取oracle为啥很慢？if(osa.dwMajorVersion==5)
m_pConnection->Open("Provider=MSDAORA.1;User ID=READEXPORT;Password=123456;Data Source=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.1.13)(PORT=1521)))(CONNECT_DATA=(SID=FIXDB)));Persist Security Info=True","","",adModeUnknown);
else
m_pConnection->Open("Provider=OraOLEDB.Oracle;User ID=READEXPORT;Password=123456;Data Source=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.1.13)(PORT=1521)))(CONNECT_DATA=(SID=FIXDB)));Persist Security Info=True","","",adModeUnknown);
select name,ssn from dbtotal.account vc ado去连接oracle,同网段内网，5000条数据读取俩字段，逐条读取，需要30秒+，请问该如何提速？