php - 快速计算每种产品过去 6、3、1 个月的平均月销售额

Question

我正在使用 PHP/MySQL

我有大约 2,000 种产品。我必须计算每种产品过去 6、3、1 个月的平均月销售额，并立即将其显示在页面中...

目前我有以下代码(每个产品循环):

$past_month_sales = $this->SalesPerProduct->getSalesForMonthYear( $acc_code,
                                                                $item_code, $past_month[0],
                                                                $past_month[1] );

$past_two_months_sales = $this->SalesPerProduct->getSalesForMonthYear( $acc_code,
                                                                    $item_code, $past_two_months[0],
                                                                    $past_two_months[1] );

$past_three_months_sales = $this->SalesPerProduct->getSalesForMonthYear( $acc_code,
                                                                    $item_code, $past_three_months[0],
                                                                    $past_three_months[1] );

$past_four_months_sales = $this->SalesPerProduct->getSalesForMonthYear( $acc_code,
                                                                    $item_code, $past_four_months[0],
                                                                    $past_four_months[1] );

$past_five_months_sales = $this->SalesPerProduct->getSalesForMonthYear( $acc_code,
                                                                    $item_code, $past_five_months[0],
                                                                    $past_five_months[1] );

$past_six_months_sales = $this->SalesPerProduct->getSalesForMonthYear( $acc_code,
                                                                    $item_code, $past_six_months[0],
                                                                    $past_six_months[1] );

//for past 3 months
if( $past_month_sales == 0
    || $past_two_months_sales == 0
    || $past_three_months_sales == 0){

    $past_three_sales_ave = "n/a";

}else{

    $past_three_sales_ave = round( ( $past_month_sales 
                        + $past_two_months_sales
                        + $past_three_months_sales )
                        / 3 );
}

//for past 6 months
if( $past_month_sales == 0
    || $past_two_months_sales == 0
    || $past_three_months_sales == 0
    || $past_four_months_sales == 0
    || $past_five_months_sales == 0
    || $past_six_months_sales == 0){

    $past_six_sales_ave = "n/a";

}else{
    $past_six_sales_ave = round( ( $past_month_sales
                        + $past_two_months_sales
                        + $past_three_months_sales
                        + $past_four_months_sales
                        + $past_five_months_sales
                        + $past_six_months_sales )
                        / 6 );
}

但是上面的代码非常慢，即使是 100 个产品也需要很长时间才能加载...

我的 getSalesForMonthYear 函数如下所示:

function getSalesForMonthYear( $account_code, $item_code, $month, $year ){
    $sql = "select 
                SalesPerProduct.sales_value
            from 
                sales_per_products as SalesPerProduct
            where
                account_code = '{$account_code}' and
                item_code = '{$item_code}' and
                month = '{$month}' and
                year = '{$year}'";

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

    if( empty( $val[0]['SalesPerProduct']['sales_value'] ) ){
        $val = 0;
    }else{
        $val = $val[0]['SalesPerProduct']['sales_value'];
    }
    return $val;
}

知道如何才能这么快吗？蒂亚!!!

Answer 1

你不需要每次点击都更新数据，所以建立一个缓存表来保存数据并在你想要的每个时间段更新