Yii如何從Count和Group中獲取數據通過

Question

如何通過在Yii中執行此查詢來獲取數組？

SELECT `sevrity_id`,COUNT(*) FROM `Incident` GROUP BY `sevrity_id` 

我需要一個這樣的數組：array(1=>20,2=10,3=12)

Answer 1

public function getSevrityCounts() 
{ 
    $data = array(); 
    $command = Yii::app()->db->createCommand('SELECT sevrity_id,COUNT(*) AS num FROM Incident GROUP BY sevrity_id'); 
    foreach($command->queryAll() as $row) { 
     $data[ $row['sevrity_id'] ] = $row['num']; 
    } 
    return $data; 
}