通过 SQL 查询特定状态的 WooCommerce 订单数和总金额（兼容 HPOS）

Question

我正在开发一个自定义 WordPress 插件，以使用 SQL 查询在管理面板中显示 WooCommerce 订单统计信息。但是，该插件没有显示正确的数据。

问题：

该插件应该显示已完成和正在处理的订单总数，以及它们的总金额和已取消订单的总数及其金额。但是，显示的统计数据不正确或根本不显示。

预期输出：

• 订单总数：[预计数量]

• 总订单金额：[预计金额]

• 取消订单总数：[预计数量]

• 已取消订单的总金额：[预计金额]

<?php
/*
Plugin Name: WooCommerce Order Stats
Description: Displays order statistics for WooCommerce in the WordPress admin panel.
Version: 1.0
Author: Your Name
*/

// Exit if accessed directly
if (!defined('ABSPATH')) {
    exit;
}

// Function to display WooCommerce order statistics
function display_woocommerce_order_stats_admin_notice() {
    global $wpdb;
    $table_prefix = $wpdb->prefix;
    $orders_table = "{$table_prefix}wc_orders"; // WooCommerce orders table name

    // Query total number of completed orders
    $total_completed_orders = $wpdb->get_var("
        SELECT COUNT(ID)
        FROM {$orders_table}
        WHERE post_status = 'wc-completed'
    ");

    // Query total amount for completed orders
    $total_completed_amount = $wpdb->get_var("
        SELECT SUM(meta.meta_value)
        FROM {$orders_table} AS orders
        INNER JOIN {$table_prefix}postmeta AS meta ON orders.ID = meta.post_id
        WHERE orders.post_status = 'wc-completed'
        AND meta.meta_key = '_order_total'
    ");

    // Query total number of processing orders
    $total_processing_orders = $wpdb->get_var("
        SELECT COUNT(ID)
        FROM {$orders_table}
        WHERE post_status = 'wc-processing'
    ");

    // Query total amount for processing orders
    $total_processing_amount = $wpdb->get_var("
        SELECT SUM(meta.meta_value)
        FROM {$orders_table} AS orders
        INNER JOIN {$table_prefix}postmeta AS meta ON orders.ID = meta.post_id
        WHERE orders.post_status = 'wc-processing'
        AND meta.meta_key = '_order_total'
    ");

    // Query total number of cancelled orders
    $total_cancelled_orders = $wpdb->get_var("
        SELECT COUNT(ID)
        FROM {$orders_table}
        WHERE post_status = 'wc-cancelled'
    ");

    // Query total amount for cancelled orders
    $total_cancelled_amount = $wpdb->get_var("
        SELECT SUM(meta.meta_value)
        FROM {$orders_table} AS orders
        INNER JOIN {$table_prefix}postmeta AS meta ON orders.ID = meta.post_id
        WHERE orders.post_status = 'wc-cancelled'
        AND meta.meta_key = '_order_total'
    ");

    // Calculate total orders and total amount
    $total_orders = $total_completed_orders + $total_processing_orders;
    $total_order_amount = $total_completed_amount + $total_processing_amount;

    // Output the statistics and table name as an admin notice
    echo '<div class="notice notice-info">';
    echo '<p><strong>WooCommerce Order Statistics (Table: ' . $orders_table . '):</strong></p>';
    echo '<ul>';
    echo '<li>Total Number of Orders: ' . $total_orders . '</li>';
    echo '<li>Total Amount for Total Orders: ' . wc_price($total_order_amount) . '</li>';
    echo '<li>Total Cancelled Orders: ' . $total_cancelled_orders . '</li>';
    echo '<li>Total Amount for Cancelled Orders: ' . wc_price($total_cancelled_amount) . '</li>';
    echo '</ul>';
    echo '</div>';
}

// Hook into the admin menu
add_action('admin_notices', 'display_woocommerce_order_stats_admin_notice');

Answer 1

您的 SQL 查询有一些错误：

• wc_orders

  表中的索引列是

  id

  但不是

  ID

  ,
• 您不需要

  JOIN

  另一个表来获取订单总金额，因为您可以使用

  wc_orders

  表

  total_amount

  列，
• 您可以在一个查询中对多个状态的订单进行分组。

所以将你的函数替换为：

function display_woocommerce_order_stats_admin_notice() {
    global $wpdb;
    
    // Query total number of completed orders
    $total_paid_orders = $wpdb->get_var("
        SELECT COUNT(id)
        FROM {$wpdb->prefix}wc_orders
        WHERE status IN ('wc-completed', 'wc-processing')
    ");
    
    // Query total amount for completed orders
    $total_paid_orders_amount = $wpdb->get_var("
        SELECT SUM(total_amount)
        FROM {$wpdb->prefix}wc_orders
        WHERE status IN ('wc-completed', 'wc-processing')
    ");
    
    // Query total number of cancelled orders
    $total_cancelled_orders = $wpdb->get_var("
        SELECT COUNT(id)
        FROM {$wpdb->prefix}wc_orders
        WHERE status = 'wc-cancelled'
    ");
    
    // Query total amount for cancelled orders
    $total_cancelled_orders_amount = $wpdb->get_var("
        SELECT SUM(total_amount)
        FROM {$wpdb->prefix}wc_orders
        WHERE status = 'wc-cancelled'
    ");

    // Output the statistics and table name as an admin notice
    echo '<div class="notice notice-info">';
    echo '<p><strong>WooCommerce Order Statistics (Table: wc_order):</strong></p>';
    echo '<ul>';
    echo '<li>Total Number of Orders: ' . $total_paid_orders . '</li>';
    echo '<li>Total Amount for Total Orders: ' . wc_price($total_paid_orders_amount) . '</li>';
    echo '<li>Total Cancelled Orders: ' . $total_cancelled_orders . '</li>';
    echo '<li>Total Amount for Cancelled Orders: ' . wc_price($total_cancelled_orders_amount) . '</li>';
    echo '</ul>';
    echo '</div>';
}

应该会更好用