Useful WordPress MySQL Snippets

# Change Siteurl & Homeurl UPDATE wp_options SET option_value = replace(option_value, 'http://www.oldsiteurl.com', 'http://www.newsiteurl.com') WHERE option_name = 'home' OR option_name = 'siteurl'; # Change GUID UPDATE wp_posts SET guid = REPLACE (guid, 'http://www.oldsiteurl.com', 'http://www.newsiteurl.com'); # Change URL in Content UPDATE wp_posts SET post_content = REPLACE (post_content, 'http://www.oldsiteurl.com', 'http://www.newsiteurl.com'); # Change Image Path Only UPDATE wp_posts SET post_content = REPLACE (post_content, 'src="http://www.oldsiteurl.com', 'src="http://yourcdn.newsiteurl.com'); UPDATE wp_posts SET guid = REPLACE (guid, 'http://www.oldsiteurl.com', 'http://yourcdn.newsiteurl.com') WHERE post_type = 'attachment'; # Update Post Meta UPDATE wp_postmeta SET meta_value = REPLACE (meta_value, 'http://www.oldsiteurl.com','http://www.newsiteurl.com'); # Change Default "Admin" Username UPDATE wp_users SET user_login = 'Your New Username' WHERE user_login = 'Admin'; # Reset Password UPDATE wp_users SET user_pass = MD5( 'new_password' ) WHERE user_login = 'your-username'; # Assign all articles by Author B to Author A UPDATE wp_posts SET post_author = 'new-author-id' WHERE post_author = 'old-author-id'; # Delete 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' # Delete Post Meta DELETE FROM wp_postmeta WHERE meta_key = 'your-meta-key'; # Export all Comment Emails with no Duplicate SELECT DISTINCT comment_author_email FROM wp_comments; # Delete all Pingbacks DELETE FROM wp_comments WHERE comment_type = 'pingback'; # Delete all Spam Comments DELETE FROM wp_comments WHERE comment_approved = 'spam'; # * 0 = Comment Awaiting Moderation # * 1 = Approved Comment # * spam = Comment marked as Spam # Identify Unused Tags SELECT * From wp_terms wt INNER JOIN wp_term_taxonomy wtt ON wt.term_id=wtt.term_id WHERE wtt.taxonomy='post_tag' AND wtt.count=0;