问建立YII活动记录模型的特定关系

EN

$mySqlString = "
    select VUF._Fld7468_S as Loading_Time_To_DLR  
    FROM Vehicles as Vehicles  
    left join (_InfoReg7464 as VUF                 
    inner join _Chrc7246 as CFU
    on VUF._Fld7467RRef = CFU._IDRRef                  
    and CFU._Description ='Vehicle uploading for DLRTime')                 
    on Vehicles._IDRRef =  VUF._Fld7465RRef
";
$command = Yii::app()->db->createCommand($mySqlString); 
$aResult = $command->query()->readAll();

$command->bindParam(":userID", $userID, PDO::PARAM_STR);