WordPress 常用数据库SQL查询语句大全

这时我轻轻地闭上了眼睛，我好像来到童话世界，好像在和小鸟讨论秋天的美景，好像在和小草拍秋天的照片。农民伯伯在田野里收获了庄稼，果农们在果园里收获了果子，我们在学校里收获快乐、收获知识、收获成长。

在使用WordPress的过程中，我们少不了要对数据库进行修改操作，比如，更换域名、修改附件目录、批量修改文章内容等等。这个时候，使用SQL查询语句可以大大简化我们的工作量。

关于如何操作SQL查询语句，请移步《phpMyAdmin好代码教程之使用SQL查询语句修改数据库信息》

下面分享一些wordpress常用的SQL查询语句

注：1.在每次使用SQL查询语句前，请务必导出数据库备份！！
2.下面的SQL查询语句，数据库都是使用WordPress默认的 wp_ 表头，请根据自己的实际修改。

1. 删除所有未使用的标签

DELETE a,b,c
FROM wp_terms AS a
LEFT JOIN wp_term_taxonomy AS c ON a.term_id = c.term_id
LEFT JOIN wp_term_relationships AS b ON b.term_taxonomy_id = c.term_taxonomy_id
WHERE c.taxonomy = 'post_tag' AND c.count = 0

DELETE a,b,c FROM wp_terms AS a LEFT JOIN wp_term_taxonomy AS c ON a.term_id = c.term_id LEFT JOIN wp_term_relationships AS b ON b.term_taxonomy_id = c.term_taxonomy_id WHERE c.taxonomy = 'post_tag' AND c.count = 0

2.删除所有文章修订版本(Revisions)以及它们的Meta数据

DELETE a,b,c
FROM wp_posts a
LEFT JOIN wp_term_relationships b ON (a.ID = b.object_id)
LEFT JOIN wp_postmeta c ON (a.ID = c.post_id)
WHERE a.post_type = 'revision'

DELETE a,b,c FROM wp_posts a LEFT JOIN wp_term_relationships b ON (a.ID = b.object_id) LEFT JOIN wp_postmeta c ON (a.ID = c.post_id) WHERE a.post_type = 'revision'

3. 更改WordPress地址和首页地址

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UPDATE wp_options
SET option_value = replace(option_value, 'http://www.旧网址.com', 'http://www.新网址.com')
WHERE option_name = 'home' OR option_name = 'siteurl'

UPDATE wp_options SET option_value = replace(option_value, 'http://www.旧网址.com', 'http://www.新网址.com') WHERE option_name = 'home' OR option_name = 'siteurl'

4. 更改文章的GUID

1 2	UPDATE wp_posts SET guid = REPLACE (guid, 'http://www.旧网址.com', 'http://www.新网址.com')

UPDATE wp_posts SET guid = REPLACE (guid, 'http://www.旧网址.com', 'http://www.新网址.com')

5. 更改正文中的链接地址

1 2	UPDATE wp_posts SET post_content = REPLACE (post_content, 'http://www.旧网址.com', 'http://www.新网址.com')

UPDATE wp_posts SET post_content = REPLACE (post_content, 'http://www.旧网址.com', 'http://www.新网址.com')

6. 更新文章的Meta值

1 2	UPDATE wp_postmeta SET meta_value = REPLACE (meta_value, 'http://www.旧网址.com', 'http://www.新网址.com')

UPDATE wp_postmeta SET meta_value = REPLACE (meta_value, 'http://www.旧网址.com', 'http://www.新网址.com')

7. 重设Admin密码

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UPDATE wp_users
SET user_pass = MD5( 'new_password' )
WHERE user_login = 'admin'

UPDATE wp_users SET user_pass = MD5( 'new_password' ) WHERE user_login = 'admin'

8. 重设admin的用户名

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UPDATE wp_users
SET user_login = 'newname'
WHERE user_login = 'admin'

UPDATE wp_users SET user_login = 'newname' WHERE user_login = 'admin'

9. 将作者a的文章全部转移到作者b

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UPDATE wp_posts
SET post_author = 'b'
WHERE post_author = 'a'

UPDATE wp_posts SET post_author = 'b' WHERE post_author = 'a'

10. 删除文章的meta标签

1 2	DELETE FROM wp_postmeta WHERE meta_key = 'your-meta-key'

DELETE FROM wp_postmeta WHERE meta_key = 'your-meta-key'

11. 导出所有评论中的邮件地址

1 2	SELECT DISTINCT comment_author_email FROM wp_comments

SELECT DISTINCT comment_author_email FROM wp_comments

12. 删除所有的Pingback

1 2	DELETE FROM wp_comments WHERE comment_type = 'pingback'

DELETE FROM wp_comments WHERE comment_type = 'pingback'

13. 删除所有的垃圾评论

1 2	DELETE FROM wp_comments WHERE comment_approved = 'spam'

DELETE FROM wp_comments WHERE comment_approved = 'spam'

14. 禁用所有激活的插件

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UPDATE wp_options
SET option_value = ''
WHERE option_name = 'active_plugins'

UPDATE wp_options SET option_value = '' WHERE option_name = 'active_plugins'

15. 罗列所有未使用的Meta标签

SELECT *
FROM wp_postmeta pm
LEFT JOIN wp_posts wp ON wp.ID = pm.post_id
WHERE  wp.ID IS NULL

SELECT * FROM wp_postmeta pm LEFT JOIN wp_posts wp ON wp.ID = pm.post_id WHERE wp.ID IS NULL

16. 关闭旧文章的留言

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UPDATE wp_posts
SET comment_status = 'closed'
WHERE post_date < '2009-01-01' AND post_status = 'publish'

UPDATE wp_posts SET comment_status = 'closed' WHERE post_date < '2009-01-01' AND post_status = 'publish'

17. 更新留言者的网址

1 2	UPDATE wp_comments SET comment_author_url = REPLACE( comment_author_url, 'http://旧网址.com', 'http://新网址.com' )

UPDATE wp_comments SET comment_author_url = REPLACE( comment_author_url, 'http://旧网址.com', 'http://新网址.com' )

18. 更新正文内所有的’target=”_blank”‘为’rel=”nofollow”‘

1 2	UPDATE wp_posts SET post_content = REPLACE (post_content, 'target="_blank', 'rel="nofollow')

UPDATE wp_posts SET post_content = REPLACE (post_content, 'target="_blank', 'rel="nofollow')

以上18条来自 http://paranimage.com/19-wordpress-sql-hacks/，以后将继续补充。

19.删除未使用的Meta标签

DELETE pm
FROM wp_postmeta pm
LEFT JOIN wp_posts wp ON wp.ID = pm.post_id
WHERE wp.ID IS NULL

DELETE pm FROM wp_postmeta pm LEFT JOIN wp_posts wp ON wp.ID = pm.post_id WHERE wp.ID IS NULL

20.删除重复的自定义字段（Custom Fields）

详见：https://www.wpdaxue.com/remove-duplicate-custom-fields.html

21.更改文章自定义字段的名称

1	UPDATE `wp_postmeta` SET `meta_key` = '新名称' WHERE `meta_key` = '旧名称';

UPDATE `wp_postmeta` SET `meta_key` = '新名称' WHERE `meta_key` = '旧名称';

以上就是WordPress 常用数据库SQL查询语句大全。明白很多事情无法顺着自我的意思，但是发奋用最恰当的方式让事情变成最后自我想要的样貌。强壮是，如果最后事情实在无法实现，那么也能够理解下来，不会失控，而是冷静理智的去想下一步。更多关于WordPress 常用数据库SQL查询语句大全请关注haodaima.com其它相关文章！

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