This article aims to provide an efficient SQL query method for retrieving users who have not made any orders in the past two weeks in the WooCommerce platform. By leveraging WordPress's get_posts function and date_query parameter, we can accurately filter out user data that meets the criteria, thereby providing effective data support for marketing activities, customer care, etc.

In the WooCommerce platform, sometimes we need to identify users who have not made purchases for a period of time in order to conduct targeted marketing activities or customer care. The following describes how to use the get_posts function and the date_query parameter to get a list of users who have not placed orders in the past two weeks.

Core idea

The core idea is to use WordPress's get_posts function to query shop_order type articles (i.e. WooCommerce orders) and limit the order creation date range through the date_query parameter. Then, by determining whether the user has an order within the specified date range, it is determined whether the user belongs to the user group that has "no orders within two weeks".

Implementation method

The following is an example function to determine whether a specified user has placed an order in the past two weeks:

 function has_bought_in_last_two_weeks($user_id) {
    // Get all orders of the user in the past two weeks $customer_orders = get_posts( array(
        'numberposts' => -1, // Get all orders 'meta_key' => '_customer_user', // User ID associated with the order
        'meta_value' => $user_id, // Specify user ID
        'post_type' => 'shop_order', // WooCommerce order type 'post_status' => 'wc-completed', // Only query completed orders 'date_query' => array(
            'after' => date('Ym-d', strtotime('-14 days')) // Order date is 14 days ago)
    ) );

    // Return true if the user has an order in the past two weeks, otherwise return false
    return count( $customer_orders ) > 0 ? true : false;
}

Code explanation

1. get_posts function: This is a function provided by WordPress to get articles.
2. numberposts parameter: Set to -1 means to get all orders that meet the criteria.
3. meta_key and meta_value parameters: Used to filter orders for specific users. _customer_user is a custom field used by WooCommerce to store the order-associated user ID.
4. post_type parameter: Set to shop_order, specify to query WooCommerce order.
5. post_status parameter: set to wc-completed to query only completed orders. It can be modified to other order statuses as needed, such as wc-processing.
6. date_query parameter: This is a key parameter used to limit the date range of the order. The after key specifies the start date of the date range, which is set to 14 days ago.
7. date('Ym-d', strtotime('-14 days')): Use PHP's date and strtotime functions to calculate dates 14 days ago and format them into YYYY-MM-DD format.
8. count( $customer_orders ) > 0: Determine whether there is an order in the query result. If so, it means that the user has placed an order in the past two weeks.

How to use

To obtain all users who have not placed an order within two weeks, you can loop through all users and use the above functions to make judgments:

 $all_users = get_users(); // Get all users $users_without_order_in_last_two_weeks = array();

foreach ($all_users as $user) {
    $user_id = $user->ID;

    if (!has_bought_in_last_two_weeks($user_id)) {
        $users_without_order_in_last_two_weeks[] = $user;
    }
}

// $users_without_order_in_last_two_weeks contains all user objects that have not placed an order within two weeks// These users can be further processed as needed

Things to note

• Performance optimization: If the number of users is very large, looping through all users may affect performance. Consider using SQL queries to get the qualified user ID directly from the database to improve efficiency.
• Order status: The above code only checks orders with wc-completed status. If you need to consider orders in other states, you need to modify the post_status parameter.
• Time range adjustment: The after key in the date_query parameter can be modified as needed to adjust the time range.
• Caching: Consider using WordPress's object caching mechanism to cache query results and avoid repeated query of the database.

Summarize

By using the get_posts function and the date_query parameter, you can easily get a list of users who have not placed orders within the specified date range in WooCommerce. This method is simple and easy to understand and is suitable for most scenarios. In practical applications, appropriate adjustments and optimizations need to be made according to specific needs.

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