一、
$connection = Yii::app()->db;
$sql = "SELECT * FROM `project` ORDER BY id DESC";
$command = $connection->createCommand($sql);
$result = $command->queryAll();
print_r($result);
二、
$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";