add_action( \'wp\', \'delete_expired_coupons_daily\' );
function delete_expired_coupons_daily() {
if ( ! wp_next_scheduled( \'delete_expired_coupons\' ) ) {
    wp_schedule_event( time(), \'daily\', \'delete_expired_coupons\');
 }
}
add_action( \'delete_expired_coupons\', \'delete_expired_coupons_callback\' );
function delete_expired_coupons_callback() {
   $args = array(
    \'post_type\' => \'coupon\',
    \'posts_per_page\' => -1
);

$coupons = new WP_Query($args);
if ($coupons->have_posts()):
    while($coupons->have_posts()): $coupons->the_post();  
       // get the post publish date  
       $test = get_the_date();
       // convert it to strto 
       $converter = strtotime($test);
       // add 3 months to it
       $deletedate = date(strtotime("+3 month", $converter));
       // check if today is more than 3 months of publish date
        if (time() > $deletedate) {
            wp_delete_post(get_the_ID());
            //Use wp_delete_post(get_the_ID(),true) to delete the post from the trash too.                  
        }

    endwhile;
endif; 
}

将增量更改为3分钟/秒，以便通过

     $test = get_the_date(\'F j, Y G:i:s\');
     $converter = strtotime($test);
     $deletedate = date(strtotime("+3 minutes", $converter));

有两种方法可以做到这一点，我可以想到。。。

最简单的似乎是wp\\u cron命令。

http://codex.wordpress.org/Function_Reference/wp_cron

或者，您可以尝试此插件http://wordpress.org/extend/plugins/wp-cron-control/让它成为你想要的。

我无法提供您所需的excact SQL，但使用这两个SQL，您应该能够在站点上运行计划的无人参与事件。