SELECT area_id  FROM 16tree.ts_area  where pid=0;

<?php
//1可以防止注入
$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";
}

//2可以防止注入

$oDbConnection = Yii::app()->db; // 获取数据库连接（config \ / main.php设置链接的数据库
// 在这里，你将用你的复杂的SQL查询使用字符串或其他一的方式来创建查询
$oCommand = $oDbConnection->createCommand('SELECT * FROM my_table WHERE myAttr = :myValue');
// 绑定参数
$oCommand->bindParam(':myValue', $myValueThatCameFromPostOrAnywereElse, PDO::PARAM_STR);

$oCDbDataReader = $oCommand->queryAll(); // 运行查询并在cdbdatareader获得所有的结果
?>