yii中find()指定条件

$modelName::model->find();    

$criteria = new CDbCriteria();
$criteria->select = array(‘uid‘,‘username‘,‘info‘);
$criteria->order = ‘uid desc‘;
$criteria->find($criteria);

$modelName::model()->find(array(
    ‘select‘=>array(‘uid‘,‘username‘,‘info‘),
    ‘order‘=>‘uid desc‘,
    ‘condition‘=>‘uid = :uid‘,
    ‘params‘=>array(‘:uid‘=>2),
));