使用 SQL 查询以 CSV 格式导出 WordPress 帖子和元信息

Question

抱歉，这是duplicate of entry of this post，但我发现我没有得到正确的答案，不知道如何要求将其移至 SO？

我需要使用 CSV 格式的 SQL 查询导出所有 WordPress 帖子和相关元信息。我设法只导出了帖子，但意识到元信息在另一个表中。

有人能告诉我我会怎么做吗？

谢谢！

编辑：我已经尝试了许多插件，但没有一个适用于这种特定情况。我确实需要处理查询本身。谢谢

编辑：CSV 文件的最终结果应如下所示。在一行上，这些是我最终会得到的列。 （我将删除 CSV 中的附加列，我只是在这里给出一个缩短的版本）

post_content | post_title | **meta_key** | *meta_value* | **meta_key** | *meta_value* | **meta_key** | *meta_value* | **meta_key** | *meta_value* | **meta_key** | *meta_value* 

所以每行一个帖子，元信息在同一行。

编辑：使用 S-ha-dum，我设法找到了一些方法，但我有大约 12 个 meta_value > meta_key 值要从数据库中提取出来，所以我需要帮助来编写其余部分请查询

SELECT *,(SELECT meta_value FROM wp_postmeta WHERE wp_postmeta.meta_key = 'Publisher' AND wp_postmeta.post_id = wp_posts.ID) as Publisher FROM wp_posts

Answer 1

尝试许多 CSV 导出插件。我使用this one 效果很好。

Answer 2

我认为您需要的一切都在 *_posts 和 *_postmeta 表中。

有两种方法可以做到这一点。首先，只需在 *_post 表上加入 *_postmeta 表。

"SELECT * FROM {$wpdb->posts} LEFT JOIN {$wpdb->postmeta} ON {$wpdb->posts}.ID = {$wpdb->postmeta}.post_id"

您将希望枚举您的字段，而不是使用星号或课程。每个帖子最终都会有多行，您必须循环访问和组织。

第二，写子查询。

"SELECT *,(SELECT meta_value FROM {$wpdb->postmeta} WHERE {$wpdb->postmeta}.meta_key = 'Publisher' AND {$wpdb->postmeta}.post_id = {$wpdb->posts}.ID) as Publisher,... FROM {$wpdb->posts}"

子查询在这种情况下应该执行得很好。再次枚举您的字段。

Answer 3

最后一位朋友设法帮助我解决了我的问题。这是他将所有带有元信息的帖子导出到 CSV 文件的最后一个 SQL 查询。

SELECT DISTINCT
post_title
, post_content
,(SELECT meta_value FROM wp_postmeta WHERE wp_postmeta.meta_key = 'Asking Price (US\$)' AND wp_postmeta.post_id = wp_posts.ID) as "Asking Price (US\$)"
,(SELECT meta_value FROM wp_postmeta WHERE wp_postmeta.meta_key = 'Asking Price (ZAR)' AND wp_postmeta.post_id = wp_posts.ID) as "Asking Price (ZAR)"
,(SELECT meta_value FROM wp_postmeta WHERE wp_postmeta.meta_key = 'Author' AND wp_postmeta.post_id = wp_posts.ID) as Author
,(SELECT meta_value FROM wp_postmeta WHERE wp_postmeta.meta_key = 'Binding' AND wp_postmeta.post_id = wp_posts.ID) as Binding
,(SELECT meta_value FROM wp_postmeta WHERE wp_postmeta.meta_key = 'Book Condition' AND wp_postmeta.post_id = wp_posts.ID) as "Book Condition" 
,(SELECT meta_value FROM wp_postmeta WHERE wp_postmeta.meta_key = 'Book Number' AND wp_postmeta.post_id = wp_posts.ID) as "Book Number" 
,(SELECT meta_value FROM wp_postmeta WHERE wp_postmeta.meta_key = 'Book Type' AND wp_postmeta.post_id = wp_posts.ID) as "Book Type"
,(SELECT meta_value FROM wp_postmeta WHERE wp_postmeta.meta_key = 'Edition' AND wp_postmeta.post_id = wp_posts.ID) as  Edition
,(SELECT meta_value FROM wp_postmeta WHERE wp_postmeta.meta_key = 'Illustrator' AND wp_postmeta.post_id = wp_posts.ID) as Illustrator 
,(SELECT meta_value FROM wp_postmeta WHERE wp_postmeta.meta_key = 'Inscription' AND wp_postmeta.post_id = wp_posts.ID) as Inscription 
,(SELECT meta_value FROM wp_postmeta WHERE wp_postmeta.meta_key = 'ISBN' AND wp_postmeta.post_id = wp_posts.ID) as  ISBN
,(SELECT meta_value FROM wp_postmeta WHERE wp_postmeta.meta_key = 'Jacket Condition' AND wp_postmeta.post_id = wp_posts.ID) as "Jacket Condition"
,(SELECT meta_value FROM wp_postmeta WHERE wp_postmeta.meta_key = 'Location' AND wp_postmeta.post_id = wp_posts.ID) as  Location
,(SELECT meta_value FROM wp_postmeta WHERE wp_postmeta.meta_key = 'Published Place' AND wp_postmeta.post_id = wp_posts.ID) as "Published Place"
,(SELECT meta_value FROM wp_postmeta WHERE wp_postmeta.meta_key = 'Published Year' AND wp_postmeta.post_id = wp_posts.ID) as "Published Year" 
,(SELECT meta_value FROM wp_postmeta WHERE wp_postmeta.meta_key = 'Publisher' AND wp_postmeta.post_id = wp_posts.ID) as Publisher 
,(SELECT meta_value FROM wp_postmeta WHERE wp_postmeta.meta_key = 'Size' AND wp_postmeta.post_id = wp_posts.ID) as Size
FROM wp_posts
WHERE post_type = 'post' 
ORDER BY
post_title
, post_content

感谢大家的意见！

Answer 4

自定义字段内联 SQL 导出查询

我想出了一个看起来很激烈的查询。它使用列中的自定义字段提取帖子，内联。请注意，查询中的“Concat”是在某些文本中欺骗相关帖子，您可以自行决定添加更多自定义字段。我的 SQL 应用程序（Sequel Pro）有一个 CSV 导出功能，我在查询远程数据库后使用它。工作很好。

SELECT *

FROM (

    SELECT 
        `wp_posts`.`ID` , 
        `wp_posts`.`post_title` AS `Title`,
        `wp_posts`.`post_date` AS `Date`,

        MAX( CASE WHEN `wp_postmeta`.`meta_key` = 'useremail'
        THEN `wp_postmeta`.`meta_value`
        END ) AS `Email`,

        MAX( CASE WHEN `wp_postmeta`.`meta_key` = 'usercell'
        THEN `wp_postmeta`.`meta_value`
        END ) AS `Cell Phone`,

        concat('http://yoururl.com/?p=',`wp_posts`.`ID`) as `URL`

    FROM `wp_posts`

    LEFT JOIN `wp_postmeta` ON ( `wp_posts`.`ID` = `wp_postmeta`.`post_id` )

    WHERE `wp_posts`.`post_status` = 'publish'

    AND `wp_posts`.`post_type` = 'customposttype'

    GROUP BY `wp_posts`.`ID`

    ORDER BY `wp_posts`.`post_date` DESC

) AS `t` WHERE 1 =1

结果：