To disable comments on posts older than date X in WordPress you can use the snippet below.
Sample mySQL
UPDATE wp_posts SET comment_status = 'closed' WHERE post_date < '2013-01-01' AND post_status = 'publish'
blog
How to delete all unapproved comments in WordPress
To delete all unapproved comments in WordPress you can use the following snippet.
Sample mySQL
DELETE FROM wp_comments WHERE comment_approved = 0
How to remove any post that is older than X days in WordPress
To remove any post that is older than X days in WordPress you can use the query below.
Sample mySQL
DELETE FROM wp_posts WHERE post_type = 'post' AND DATEDIFF(NOW(), post_date) > X
How to disable or enable Trackbacks and Pingbacks in WordPress
To disable or enable Trackbacks and Pingbacks in WordPress you can use the following mysql queries.
Sample mySQL
enable
UPDATE wp_posts SET ping_status = 'open';
disable
UPDATE wp_posts SET ping_status = 'closed';
How to identify unused tags in WordPress
To identify unused tags in WordPress you can use the following snippet.
SELECT * From wp_terms terms INNER JOIN wp_term_taxonomy tax ON terms.term_id=tax.term_id WHERE tax.taxonomy='post_tag' AND tax.count=0;
How to change user password in WordPress using MySql
To change user password in WordPress using MySql you can use the following query.
Sample MySql
UPDATE wp_users SET user_pass = MD5('NewPassword') WHERE user_login = 'UserName';
How to delete all pingbacks in WordPress
To delete all pingbacks in WordPress you can use the mysql query below.
DELETE FROM wp_comments WHERE comment_type = 'pingback';