Yii：使用GROUP BY子句

Question

我想使用Yii实现SQL的GROUP BY子句。在这里，我面临的问题是只返回第一行而不是所有行。

    $connection = Yii::app()->db; 
    $sql = "SELECT group_name FROM  `authitem` GROUP BY group_name";             
    $command = $connection->createCommand($sql); 
    $row = $command->queryRow();            
    print_r($row);
    $res = array(); 
    foreach ($row as $key => $val) { 
       $res[] = array('label' => $key, 'value' => $val); 
    } 
    print_r($res);

Answer 1

而不是

 $row = $command->queryRow();

尝试这样，

 $row = $command->queryAll();