OpenCart 🇺🇦

$sql = "SELECT MIN(tmp.date_added) AS date_start, MAX(tmp.date_added) AS date_end, COUNT(tmp.order_id) AS `orders`, SUM(tmp.products) AS products, SUM(tmp.tax) AS tax, SUM(tmp.total) AS total FROM (SELECT o.order_id, (SELECT SUM(op.quantity) FROM `" . DB_PREFIX . "order_product` op WHERE op.order_id = o.order_id GROUP BY op.order_id) AS products, (SELECT SUM(ot.value) FROM `" . DB_PREFIX . "order_total` ot WHERE ot.order_id = o.order_id AND ot.code = 'tax' GROUP BY ot.order_id) AS tax, o.total, o.date_added FROM `" . DB_PREFIX . "order` o"; 

if (!empty($data['filter_order_status_id'])) {
	$sql .= " WHERE o.order_status_id = '" . (int)$data['filter_order_status_id'] . "'";
} else {
	$sql .= " WHERE o.order_status_id > '0'";
}

if (!empty($data['filter_date_start'])) {
	$sql .= " AND DATE(o.date_added) >= '" . $this->db->escape($data['filter_date_start']) . "'";
}

if (!empty($data['filter_date_end'])) {
	$sql .= " AND DATE(o.date_added) <= '" . $this->db->escape($data['filter_date_end']) . "'";
}

$sql .= " GROUP BY o.order_id) tmp";

if (!empty($data['filter_group'])) {
	$group = $data['filter_group'];
} else {
	$group = 'week';
}

switch($group) {
	case 'day';
		$sql .= " GROUP BY DAY(tmp.date_added)";
		break;
	default:
	case 'week':
		$sql .= " GROUP BY WEEK(tmp.date_added)";
		break;	
	case 'month':
		$sql .= " GROUP BY MONTH(tmp.date_added)";
		break;
	case 'year':
		$sql .= " GROUP BY YEAR(tmp.date_added)";
		break;									
}

$sql .= " ORDER BY tmp.date_added DESC";

if (isset($data['start']) || isset($data['limit'])) {
	if ($data['start'] < 0) {
		$data['start'] = 0;
	}			

	if ($data['limit'] < 1) {
		$data['limit'] = 20;
	}	
	
	$sql .= " LIMIT " . (int)$data['start'] . "," . (int)$data['limit'];
}	

$query = $this->db->query($sql);

return $query->rows;