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

1
2
3
4
5
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

1
2
3
4
5
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

1
2
3
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')

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')

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')

7. 重设Admin密码

1
2
3
UPDATE wp_users
SET user_pass = MD5( 'new_password' )
WHERE user_login = 'admin'

8. 重设admin的用户名

1
2
3
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

1
2
3
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'

11. 导出所有评论中的邮件地址

1
2
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'

13. 删除所有的垃圾评论

1
2
DELETE FROM wp_comments
WHERE comment_approved = 'spam'

14. 禁用所有激活的插件

1
2
3
UPDATE wp_options
SET option_value = ''
WHERE option_name = 'active_plugins'

15. 罗列所有未使用的Meta标签

1
2
3
4
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

1
2
3
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' )

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')

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

1
2
3
4
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

04-21 03:13