Just Host Web Hosting Help

Clean up WordPress Meta Data

Overview

This article will explain how to clean up meta data in a WordPress database.



Backup your database before performing any of the steps in this article. You will be deleting data from the database. Accidentally deleting the wrong information may require restoring your database from a backup. If you are unsure how to backup your database please see How to Backup a MySQL Database

What You Need

To complete this tutorial, you will need to the following information:

Open The Database in phpMyAdmin

  1. Login to your account at my.Justhost.com
  2. Click Hosting at the top of your account.
  3. On the cPanel, under Databases, click phpMyAdmin
  4. Log in with your cPanel username and password.
    The phpMyAdmin login.
    The phpMyAdmin login.
  5. On the left side, click on your wordpress database.
    Selecting a database in phpMyAdmin.
    Selecting a database in phpMyAdmin.

Remove Rows With No ID

  1. Note the prefix attached to your database tables. In our example database, all table names begin with wp_rfrz_. This is our database prefix. Yours will differ.
    The Database table prefix.
    The Database table prefix.
  2. Click on the SQL tab.
    The SQL tab.
    The SQL tab.

Comment Meta Data

These steps explain how to clear the comment meta data.

  1. Copy and paste this code into the textbox:
              SELECT * FROM your_prefixcommentmeta WHERE comment_id NOT IN ( SELECT comment_id FROM your_prefix_comments );
              DELETE FROM your_prefix_commentmeta WHERE comment_id NOT IN ( SELECT comment_id FROM your_prefix_comments );
              SELECT * FROM your_prefix_commentmeta WHERE meta_key LIKE '%akismet%'; 
              DELETE FROM your_prefix_commentmeta WHERE meta_key LIKE '%akismet%';

  2. Replace your_prefix_ with your database prefix.
  3. Click the go button.
    The phpMyadmin SQL page.
    The phpMyadmin SQL page.

Post Meta Data

These steps explain how to clear the post meta data.

  1. Copy and paste this code into the textbox:
            SELECT * FROM your_prefix_postmeta pm LEFT JOIN your_prefix_posts wp ON wp.ID = pm.post_id WHERE wp.ID IS NULL;
            DELETE pm FROM wp_postmeta pm LEFT JOIN your_prefix__posts wp ON wp.ID = pm.post_id WHERE wp.ID IS NULL;

  2. Replace your_prefix_ with your database prefix.
  3. Click the go button.
    The phpMyadmin SQL page.
    The phpMyadmin SQL page.

Optimize The Post and Comment Tables

  1. At the top of phpMyAdmin, click the structure tab.
    The structure tab.
    The structure tab.
  2. Select the comments, commentmeta, posts, and postmeta tables.
  3. In the drop down menu labeled With Selected, choose Optimize Table.

The tables should now have unnecessary meta data removed. If you encounter any issues with the website after this procedure, consider restoring your database using your backup.

Knowledgebase Article 16,760 views bookmark tags: wordpress


Was this resource helpful?

Did this resolve your issue?


Please add any other comments or suggestions about this content:





Recommended Help Content

This article explains how to install WordPress when Mojo is unable to create the database automatically.
Knowledgebase Article 46,240 views tags: MOJO automatic database install wordpress

This article explains how to find the database in use by a Wordpress site.
Knowledgebase Article 75,035 views tags: database find wordpress

This article will explain how to change your WordPress Urls
Video "How-to" Tutorial 156,143 views tags: login temp troubleshooting urls wordpress

Related Help Content

This article will explain how to change the Site URL or Home URL setting in WordPress. This may be useful if you have moved your WordPress site or are planning to move your WordPress site.
Knowledgebase Article 67,451 views tags: home site url wordpress wordpresstools

This article will explain how to login to a website created with WordPress.
Knowledgebase Article 151,048 views tags: access admin change dashboard edit login site wordpress

This article will explain how to login to a WordPress site using WordPress tools.
Knowledgebase Article 52,758 views tags: login wordpress wordpresstools

This article will explain why you see "Your WordPress site appears to be infected with malware. Please update to remedy this problem."
Knowledgebase Article 77,372 views tags: malware wordpress wordpresstools

This article will explain MySQL database and user creation and deletion, and explain how to assign a user to a database.
Knowledgebase Article 597,278 views tags: creation database mysql

This article will explain how to change the password for a database in the event that the original password is lost.
Knowledgebase Article 66,954 views tags: database mysql password

This article explains how to reset a lost WordPress password using phpMyAdmin.
Knowledgebase Article 49,686 views tags: password phpmyadmin wordpress

This article will walk you through the steps to copying and renaming a database with phpMyAdmin.
Knowledgebase Article 37,986 views tags: database phpmyadmin