Yii框架中 find findAll 查找出制定的字段的方法对比

$criteria = new CDbCriteria;
$criteria->select = 'username,id,email';
$criteria->order = 'id DESC';
$users = modelName::model()->findAll( $criteria );

$users = modelName::model()->findAll(array(
  'select' =>array('username','id','email'),
  'order' => 'id DESC',
));

$user = modelName::model()->find(array(
  'select' =>array('username','id','email'),
  'order' => 'id DESC',
  'condition' => 'id='.$id,
));

$users = $this->user->find(array(
  'select'=>array('id','username','email'),
  'order' => 'id DESC',
  'condition' => 'state=:state AND id=:id',
  'params' => array(':state'=>'1',':id' => '2'),
));

$criteria = new CDbCriteria() ;
$criteria -> select = array('v_id','title','big_class','sub_class','upload_time','comment_num');    
$criteria -> condition = 'status = 1';
$criteria -> order = 'lastmodifytime desc';
$criteria -> limit = 3;
 $criteria ->params = array (':status' => $你的变量) ;
$result = VideoInfo::model()->findAll($criteria);

$criteria -> condition = 'status = :status';

foreach ($result as $ob){
      print_r($ob->attributes);
 }

$ob->attributes['title'];

$count =VideoInfo::model()->count($criteria)
 
$pages=new CPagination($count);   
$pages->pageSize=30; //每页分多少条
$pages->applyLimit($criteria);

$result = VideoInfo::model()->findAll($criteria);