Yii2 打印sql语句和批量插入数据

打印sql语句：

$model->find()->createCommand()->getRawSql();

批量插入

Yii::$app->db->createCommand()->batchInsert(UserModel::tableName(), ['user_id','username'], [
　　['1','test1'],
　　['2','test2'],
　　['3','test3'],
])->execute();