Mysql 连接回表以获取其余数据

我运行了以下代码：

SELECT * FROM wp_postmeta 
INNER JOIN wp_term_relationships ON wp_postmeta.post_id = wp_term_relationships.object_id AND wp_term_relationships.term_taxonomy_id = '10' 
LEFT JOIN wp_posts ON wp_postmeta.post_id = wp_posts.id AND wp_postmeta.meta_value = 'US' AND wp_posts.post_date BETWEEN CONCAT(CURDATE(),' 10:00:00') AND CONCAT(CURDATE(),' 18:00:00')
WHERE wp_postmeta.meta_key = '_shipping_country' AND wp_postmeta.meta_value IN ('AU', 'US', 'JP', 'BR', 'UK')
ORDER BY wp_postmeta.post_id DESC

只需选择

wp\u postmeta.meta\u键

和

wp\u postmeta.meta\u值

，它们等于

\u shipping\u country

和

AU

这些字段中还有很多数据需要检索

所以，我假设我在最后把它连接起来，就像这样：

SELECT * FROM wp_postmeta 
INNER JOIN wp_term_relationships ON wp_postmeta.post_id = wp_term_relationships.object_id AND wp_term_relationships.term_taxonomy_id = '10' 
LEFT JOIN wp_posts ON wp_postmeta.post_id = wp_posts.id AND wp_postmeta.meta_value = 'US' AND wp_posts.post_date BETWEEN CONCAT(CURDATE(),' 10:00:00') AND CONCAT(CURDATE(),' 18:00:00')
WHERE wp_postmeta.meta_key = '_shipping_country' AND wp_postmeta.meta_value IN ('AU', 'US', 'JP', 'BR', 'UK')
LEFT JOIN wp_postmeta ON wp_posts.id = wp_postmeta.post_id
ORDER BY wp_postmeta.post_id DESC

---

但是这失败了？

更新了查询，因此它应该返回发货国家/地区与“AU”、“US”、“JP”、“BR”或“UK”匹配的订单的所有数据

SELECT * FROM wp_postmeta 
INNER JOIN wp_term_relationships ON wp_postmeta.post_id = wp_term_relationships.object_id AND wp_term_relationships.term_taxonomy_id = '10' 
LEFT JOIN wp_posts ON wp_postmeta.post_id = wp_posts.id AND wp_posts.post_date BETWEEN CONCAT(CURDATE(),' 10:00:00') AND CONCAT(CURDATE(),' 18:00:00')
WHERE EXISTS(SELECT * FROM wp_postmeta pm2 WHERE pm2.post_id = wp_posts.id AND pm2.meta_key = '_shipping_country' AND pm2.meta_value IN ('AU', 'US', 'JP', 'BR', 'UK'))
ORDER BY wp_postmeta.post_id DESC

---

嗨，不幸的是这不起作用。我得到“非唯一别名/表”。我读得太快了。wp_Posteta表已经是查询的一部分，所以我不确定您为什么要再次添加它。嗯，是的，老实说，我也不是。我非常困惑。我想从wp_postmeta.meta_key和wp_postmeta.meta_value中选择所有订单，但仅在该数组中的post是发货国的位置。也许我需要移动这个来聊天，以真正告诉你发生了什么。基本上，当前的声明只显示了带有_shipping_country和“AU”的行。它还应该包括更多内容。它显示：。我想要所有这些：但仅限于与上述条件相关联的情况。你明白了吗？好的，那么你想得到发往“AU”、“US”、“JP”、“BR”或“UK”的订单的所有元数据？让我更新我的答案