Question

我目前正在开发一个专为面包店设计的插件，用于通过电子邮件发送有关订单的报告。他们已经开设了另一家商店，现在需要根据商店位置将报告拆分为单独的电子邮件。

我有以下sql查询：

$sql = "SELECT o.order_item_id, o.order_item_name, o.order_id, po.post_date AS order_date_placed
        FROM wp_woocommerce_order_items AS o
        LEFT JOIN wp_woocommerce_order_itemmeta AS oi ON o.order_item_id = oi.order_item_id
        LEFT JOIN wp_posts AS po ON po.ID = o.order_id
        WHERE oi.meta_key='Collection Date'
        AND oi.meta_value IN ('16/01/2016','17/01/2016','18/01/2016','19/01/2016','20/01/2016','21/01/2016')
        ORDER BY po.post_date ASC, o.order_item_id ASC";

此查询返回在特定日期范围内收集的所有订单。

array (size=3)
  0 => 
    object(stdClass)[593]
      public 'order_item_id' => string '19582' (length=5)
      public 'order_item_name' => string '10 Chocolate Cupcakes' (length=21)
      public 'order_id' => string '15234' (length=5)
      public 'order_date_placed' => string '2016-01-14 08:51:31' (length=19)
  1 => 
    object(stdClass)[592]
      public 'order_item_id' => string '19600' (length=5)
      public 'order_item_name' => string '10 Chocolate Cupcakes' (length=21)
      public 'order_id' => string '15248' (length=5)
      public 'order_date_placed' => string '2016-01-14 15:43:08' (length=19)
  2 => 
    object(stdClass)[591]
      public 'order_item_id' => string '19603' (length=5)
      public 'order_item_name' => string '10 Chocolate Cupcakes' (length=21)
      public 'order_id' => string '15250' (length=5)
      public 'order_date_placed' => string '2016-01-14 15:45:25' (length=19)

我现在想要传递一个额外的标准，该标准也会将返回数据限制在特定的商店位置。

我尝试在查询中添加以下内容，但这会返回null。

WHERE oi.meta_key = 'Pickup Location' 
AND oi.meta_value LIKE '%Address 1%'

只有两个条件都符合的记录必须返回。

我确实很难理解为什么wordpress / woocommerce中的meta表以他们拥有如此多冗余/重复条目的方式设置。

我不确定开发人员是否应该使用原始SQL查询，或者是否有更好的解决方案来解决此问题。

非常感谢任何帮助。

Answer 1

我猜您正在寻找此查询

SELECT o.order_item_id, 
       o.order_item_name, 
       o.order_id, 
       po.post_date AS order_date_placed 
FROM   wp_woocommerce_order_items AS o 
       LEFT JOIN wp_woocommerce_order_itemmeta AS oi 
              ON ( o.order_item_id = oi.order_item_id 
                 AND oi.meta_key = 'Collection Date' 
                       AND oi.meta_value IN ( '16/01/2016', '17/01/2016','18/01/2016',
                                              '19/01/2016','20/01/2016', '21/01/2016' ) ) 
                  OR ( oi.meta_key = 'Pickup Location' 
                       AND oi.meta_value LIKE '%Address 1%' ) 
       LEFT JOIN wp_posts AS po 
              ON po.id = o.order_id 
ORDER  BY po.post_date ASC, 
          o.order_item_id ASC

并将过滤器移至ON条件，因为它们属于右表

Woocommerce选择与多个元值匹配的订单

1 个答案: