====== DAO ======

  * [[yii:CDbCriteria|CDbCriteria]] - Задание условия Where
  * [[Yii:CDbCommand|CDbCommand]] - Создание SQL
  * [[yii:CDbExpression|CDbExpression]]

===== Schema =====

  * CDbSchema::getDbConnection()->createCommand($sql)->queryAll();
  * CDbSchema::getDbConnection()->loadTable($realName);

===== command =====

  * Yii::app()->db->createCommand($sql)->queryAll();
  * Yii::app()->db->createCommand()->select('u.*')->from('user u')->where('u.role_id = :role_id', array(':role_id' => '1'))->queryAll();
