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
1. 删除所有未使用的标签
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| 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
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| 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' |
4. 更改文章的GUID
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| 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
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| 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
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| 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' |
8. 重设admin的用户名
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| 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' |
10. 删除文章的meta标签
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| DELETE FROM wp_postmeta
WHERE meta_key = 'your-meta-key' |
11. 导出所有评论中的邮件地址
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| SELECT DISTINCT comment_author_email
FROM wp_comments |
12. 删除所有的Pingback
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| DELETE FROM wp_comments
WHERE comment_type = 'pingback' |
13. 删除所有的垃圾评论
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| 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' |
15. 罗列所有未使用的Meta标签
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| 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' |
17. 更新留言者的网址
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| 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”‘
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| 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
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| 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:http://www.wpdaxue.com/remove-duplicate-custom-fields.html