我如何在 php Yii2 中编写以下查询？

Question

select print_date as pdate, count(print_date) as pcount from card where print_date BETWEEN DATE_SUB(CURRENT_DATE(), INTERVAL 6 DAY) 和 CURRENT_DATE() 按 print_date 分组

*********还有一个条件 created_by=>Yii::$app->user->identity;

Answer 1

 $rows = (new \yii\db\Query())
        ->select(['print_date AS pdate','count(print_date) as pcount'])
        ->from('cards')
        ->andwhere(['between','print_date','2021-03-01','CURRENT_DATE()'])
        ->andWhere(['created_by'=>Yii::$app->user->identity->id])
        ->groupBy('print_date')
        ->all();

当我执行上述查询时，我得到了结果，但是当我用 DATE_SUB('CURRENT_DATE()',INTERVAL 7 DAYS) 替换 2021-03-01 时，我得到一个空数组 [0]

    $rows = (new \yii\db\Query())
        ->select(['print_date AS pdate','count(print_date) as pcount'])
        ->from('cards')
        ->andwhere(['between','print_date','DATE_SUB(CURRENT_DATE(), INTERVAL 6 DAY)','CURRENT_DATE()'])
        ->andWhere(['created_by'=>Yii::$app->user->identity->id])
        ->groupBy('print_date')
        ->all();