WordPress 常用数据库SQL查询语句大全

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_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'

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_posts
SET guid = REPLACE (guid, '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')

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

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

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

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

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

SELECT DISTINCT comment_author_email
FROM wp_comments

DELETE FROM wp_comments
WHERE comment_type = 'pingback'

DELETE FROM wp_comments
WHERE comment_approved = 'spam'

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

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

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

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

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