php - 使用另一个数组

Question

我正在使用两个数据库。一个数据库在Microsoft SQL 2012上，另一个在MySQL 5.5上。 Microsoft SQL Server有一个Orders表，MySQL有三个货币汇率表。订单表有来自6个不同国家的订单;但是，来自3个国家的订单的销售总额为当地货币（非美国）。 3种货币汇率表按国家/地区分隔，包含每日汇率。使用PHP，我需要按月和国家分组当前年度总销售额，并将汇率应用于那些不是美国货币的国家总销售额。每个月的汇率必须是该月的平均汇率。

下面有两个数组。第一个数组用于销售总额并按月和国家分组的订单。第二个数组是货币汇率，其平均汇率按月和国家计算和分组。

我如何将每个月的总销售额乘以非美元国家（KR，JP和NZ）的汇率？

订单

$query = $db->prepare("SELECT MONTH(US_OrderDate) AS MONTH, a.Country, SUM(a.Sales) AS Total_Sales FROM (
SELECT
    CASE 
        WHEN Country = 'KR' THEN DATEADD(DAY, +1, CAST(OrderDate AS Date)) 
        ELSE CAST(OrderDate as Date) END AS US_OrderDate, Country, SUM(Total) AS Sales FROM Orders 
WHERE (OrderStatusID in ('7','8','9') AND Country = 'KR')
OR (OrderStatusID in ('7','8','9') AND Country = 'JP')
OR (OrderStatusID in ('7','8','9') AND Country = 'AU')
OR (OrderStatusID in ('7','8','9') AND Country = 'NZ')
OR (OrderStatusID in ('7','8','9') AND Country = 'US')
OR (OrderStatusID in ('7','8','9') AND Country = 'CA')
GROUP BY CAST(OrderDate as Date),Country) AS a
WHERE YEAR(US_OrderDate) = YEAR(GETDATE())
GROUP BY MONTH(US_OrderDate), a.Country
Order BY MONTH(US_OrderDate) ASC
");
try {
    $query->execute();
    $results = $query->fetchALL(PDO::FETCH_ASSOC);
}

catch (PDOException $e) {
    die("{error: {$e->getMessage()}}");
}



array(54) {
  [0]=>
  array(3) {
    ["MONTH"]=>
    string(1) "1"
    ["Country"]=>
    string(2) "AU"
    ["Total_Sales"]=>
    string(7) "9095.70"
  }
  [1]=>
  array(3) {
    ["MONTH"]=>
    string(1) "1"
    ["Country"]=>
    string(2) "CA"
    ["Total_Sales"]=>
    string(9) "113993.00"
  }
  [2]=>
  array(3) {
    ["MONTH"]=>
    string(1) "1"
    ["Country"]=>
    string(2) "KR"
    ["Total_Sales"]=>
    string(7) "9284.75"
  }
  [3]=>
  array(3) {
    ["MONTH"]=>
    string(1) "1"
    ["Country"]=>
    string(2) "NZ"
    ["Total_Sales"]=>
    string(6) "883.25"
  }
  [4]=>
  array(3) {
    ["MONTH"]=>
    string(1) "1"
    ["Country"]=>
    string(2) "US"
    ["Total_Sales"]=>
    string(9) "609538.25"
  }
  [5]=>
  array(3) {
    ["MONTH"]=>
    string(1) "2"
    ["Country"]=>
    string(2) "AU"
    ["Total_Sales"]=>
    string(7) "7393.65"
  }
  [6]=>
  array(3) {
    ["MONTH"]=>
    string(1) "2"
    ["Country"]=>
    string(2) "CA"
    ["Total_Sales"]=>
    string(9) "100279.43"
  }
  [7]=>
  array(3) {
    ["MONTH"]=>
    string(1) "2"
    ["Country"]=>
    string(2) "JP"
    ["Total_Sales"]=>
    string(9) "916110.00"
  }
  [8]=>
  array(3) {
    ["MONTH"]=>
    string(1) "2"
    ["Country"]=>
    string(2) "KR"
    ["Total_Sales"]=>
    string(7) "5217.55"
  }
  [9]=>
  array(3) {
    ["MONTH"]=>
    string(1) "2"
    ["Country"]=>
    string(2) "NZ"
    ["Total_Sales"]=>
    string(7) "1355.85"
  }
  [10]=>
  array(3) {
    ["MONTH"]=>
    string(1) "2"
    ["Country"]=>
    string(2) "US"
    ["Total_Sales"]=>
    string(9) "616422.11"
  }
  ....

汇率

$query_exchange_rate = $db_exchange_rate->prepare("SELECT Month(date) AS MONTH, 'NZ' AS Country, ROUND((SUM(rate)/COUNT(rate)),5) AS AVG_RATE FROM currency_exchange_rates.new_zealand WHERE YEAR(date) = YEAR(CURDATE()) GROUP BY MONTH(date)
    UNION
SELECT Month(date) AS MONTH, 'JP' AS Country, ROUND((SUM(rate)/COUNT(rate)),5) AS AVG_RATE FROM currency_exchange_rates.japan WHERE YEAR(date) = YEAR(CURDATE()) GROUP BY MONTH(date)
    UNION
SELECT Month(date) AS MONTH, 'KR' AS Country, ROUND((SUM(rate)/COUNT(rate)),5) AS AVG_RATE FROM currency_exchange_rates.south_korea WHERE YEAR(date) = YEAR(CURDATE()) GROUP BY MONTH(date)
ORDER BY MONTH ASC");

try {
    $query_exchange_rate->execute();
    $results_exchange_rate = $query_exchange_rate->fetchALL(PDO::FETCH_ASSOC);
}

catch (PDOException $e) {
    die("{error: {$e->getMessage()}}");
}


array(27) {
  [0]=>
  array(3) {
    ["MONTH"]=>
    string(1) "1"
    ["Country"]=>
    string(2) "NZ"
    ["AVG_RATE"]=>
    string(7) "0.76614"
  }
  [1]=>
  array(3) {
    ["MONTH"]=>
    string(1) "1"
    ["Country"]=>
    string(2) "JP"
    ["AVG_RATE"]=>
    string(7) "0.00845"
  }
  [2]=>
  array(3) {
    ["MONTH"]=>
    string(1) "1"
    ["Country"]=>
    string(2) "KR"
    ["AVG_RATE"]=>
    string(7) "0.00090"
  }
  [3]=>
  array(3) {
    ["MONTH"]=>
    string(1) "2"
    ["Country"]=>
    string(2) "NZ"
    ["AVG_RATE"]=>
    string(7) "0.74309"
  }
  [4]=>
  array(3) {
    ["MONTH"]=>
    string(1) "2"
    ["Country"]=>
    string(2) "JP"
    ["AVG_RATE"]=>
    string(7) "0.00842"
  }
  [5]=>
  array(3) {
    ["MONTH"]=>
    string(1) "2"
    ["Country"]=>
    string(2) "KR"
    ["AVG_RATE"]=>
    string(7) "0.00090"
  }

Answer 1

只需循环浏览它们。一种简单的方法是循环遍历较长的一个，每次循环一个短的。

foreach($results as &$a) // Need to be by reference to update it easily
  foreach($results_exchange_rate as $b)
    if($a['MONTH'] == $b['MONTH'] && $a['Country']==$b['Country'])
      $a['Total_Sales']*= $b['AVG_RATE'];

每次月份和国家/地区在两个阵列中相同时，这将使总销售额乘以平均费率。