mysql選擇過去7天的每一天記錄

Question

您如何選擇最近7天的每日記錄？ 如果日期不可用，請將其設置為0。我嘗試了以下操作，但未得到任何結果。

$stmt = $db->prepare("SELECT DATE(order_date),COUNT(id) as 'total' FROM `orders` WHERE `order_date` BETWEEN DATE_SUB(CURDATE(), INTERVAL 7 DAY) AND CURDATE()GROUP BY DATE(order_date)");
$stmt->execute();
$result = $stmt->get_result();

$total = [];
while($row = $result->fetch_object()){
    $total[] = $row->total;
}
print_r($total);

Answer 1

不是我想要的實際解決方案，但我設法通過將查詢包裝在函數中並調用7次來獲得結果。

function weeklyData($day){
    $stmt = $db->prepare("SELECT order_date from orders where DATE(FROM_UNIXTIME(order_date)) = CURDATE() - INTERVAL ? DAY");
    $stmt->bind_param('s', $day);
    $stmt->execute();
    $stmt->store_result();
    return $stmt->num_rows;
}
$total = [];
for($x = 1; $x <= 7; $x++){
    $total[] = weeklyData($x);
}
print_r($total);