Yii 直接执行SQL语句(转)

$connection = Yii::app()->db;  

$sql = "SELECT * FROM `project` ORDER BY id DESC";  

$command = $connection->createCommand($sql);  

$result = $command->queryAll();  

print_r($result);  

$db = Yii::app()->db; //you have to define db connection in config/main.php  
$sql = "select sum(if(starttime>'09:00:00',1,0)) as late,  
  sum(if(endtime<'18:00:00',1,0)) as early           
from present where userid=:userid and date between :date_start and :date_end"  
$results = $db->createCommand($sql)->query(array(  
  ':userid' => 115,':date_start'=>'2009-12-1',':date_end'=>'2009-12-31',  
));  
foreach($results as $result){  
  echo $result['late']," and ",$result['early']," /n";  

}   

说明：把查询条件作为参数（如例2），比较安全，可直接避免注入。要是直接用在SQL语句中，最好要经过防注入处理。 

 $sql = "select sum(if(starttime>'09:00:00',1,0)) as late,  

  sum(if(endtime<'18:00:00',1,0)) as early           

from present where userid=115 and date between '2009-12-1' and '2009-12-31'"  

$results = $db->createCommand($sql)->query();  

foreach($results as $result){  

  echo $result['late']," and ",$result['early']," /n";  

}  

http://blog.csdn.net/straul/article/details/6320858