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
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
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’
3. 更改WordPress地址和首页地址
- 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
- 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
- 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
- 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
- UPDATE wp_users
- SET user_pass = MD5( ‘new_password’ )
- WHERE user_login = ‘admin’
8. 重设admin的用户名
- 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
- UPDATE wp_posts
- SET post_author = ‘b’
- WHERE post_author = ‘a’
10. 删除文章的meta标签
- DELETE FROM wp_postmeta
- WHERE meta_key = ‘your-meta-key’
11. 导出所有评论中的邮件地址
- SELECT DISTINCT comment_author_email
- FROM wp_comments
12. 删除所有的Pingback
- DELETE FROM wp_comments
- WHERE comment_type = ‘pingback’
13. 删除所有的垃圾评论
- DELETE FROM wp_comments
- WHERE comment_approved = ‘spam’
14. 禁用所有激活的插件
- 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
16. 关闭旧文章的留言
- 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
- 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”‘
- 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
20.删除重复的自定义字段(Custom Fields)
详见:https://dk.tkcdk.cn/remove-duplicate-custom-fields.html
21.更改文章自定义字段的名称
- UPDATE `wp_postmeta` SET `meta_key` = ‘新名称’ WHERE `meta_key` = ‘旧名称’;