WordPress Databases
When installing WordPress for the first time, you are asked to provide the name of the database that WordPress will use to store website data.
WordPress then automatically creates the necessary tables inside this database and stores the website data in them.
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Database Management System
A database is where website data is entered, stored, organized, and managed.
There are many database management systems available, but WordPress commonly relies on MySQL, a high-performance database management system capable of handling large amounts of website data.
WordPress also uses SQL commands to communicate with MySQL and perform operations such as:
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Storing data.
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Retrieving data.
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Editing data.
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Deleting data.
As a website administrator, you usually do not need to deal directly with these technical processes.
For example, when you go to Posts, create a new article, and click Publish, WordPress performs the required operations in the background. PHP sends commands to MySQL so that the new article content is stored in the appropriate database tables.
Your website database is usually hosted by your web hosting provider.
Most hosting companies support MySQL because it is one of the most widely used database management systems.
You can access your website databases from:
cPanel → phpMyAdmin
After opening phpMyAdmin, the databases associated with your website will appear.
You can click on a database to view or manage the information stored inside it.
WordPress stores database information in Tables.
Each table consists of rows and columns containing different types of information.
Database Tables
WordPress database tables can contain thousands or even millions of records.
Whenever a website administrator updates information through the WordPress dashboard, WordPress stores or updates that information in the appropriate database table.
When you open a table, you will see multiple rows containing cells, with each cell storing a specific value.
Below are some of the most important WordPress database tables.
1. wp_comments Table
The wp_comments table stores comments submitted by visitors on your website posts, pages, and other supported content.
Whenever WordPress needs to display comments, it sends a query to the database to retrieve the appropriate information.
Some important fields include:
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comment_ID: Stores the automatically generated ID of each comment.
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comment_post_ID: Stores the ID of the post associated with the comment.
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comment_author: Stores the name entered by the comment author.
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comment_author_email: Stores the author’s email address.
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comment_author_url: Stores the author’s website URL.
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comment_author_ip: Stores the IP address associated with the comment.
2. wp_commentmeta Table
This table stores metadata related to WordPress comments.
Its fields include:
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meta_id: The identifier for each metadata record.
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comment_id: The ID of the related comment.
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meta_key: The identifier of the stored metadata.
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meta_value: The actual value of the stored metadata.
3. wp_posts Table
This table stores information related to posts and other WordPress content.
Some of its fields include:
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ID: The unique ID assigned to each item.
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post_author: Stores the ID of the user who created the post.
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post_date_gmt: Stores the publishing date and time in GMT.
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post_content: Stores the complete post content.
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post_title: Stores the title of the post.
4. wp_postmeta Table
The wp_postmeta table stores metadata related to posts and pages.
Its fields include:
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meta_id: The unique metadata identifier.
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post_id: The ID of the related post.
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meta_key: The metadata key.
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meta_value: The stored metadata value.
5. wp_terms Table
The wp_terms table stores information related to categories and taxonomy terms.
Its fields include:
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term_id: The unique ID of the term.
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name: The stored term name.
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slug: The URL-friendly name used in web addresses.
6. wp_termmeta Table
This table is used by WordPress themes and plugins to store metadata related to terms.
For example, WooCommerce may use this type of metadata for product categories.
Fields include:
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meta_id: Metadata ID.
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term_id: ID of the related term.
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meta_key: Metadata key.
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meta_value: Metadata value.
7. wp_term_relationships Table
The wp_term_relationships table connects WordPress content items with taxonomy terms.
For example, it can determine that a particular product belongs to a specific category.
8. wp_users Table
The wp_users table stores information about registered website users.
Some important fields include:
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ID: User ID.
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user_login: Username.
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user_pass: Password value.
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user_nicename: Display-friendly username.
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user_email: User email address.
9. wp_usermeta Table
This table stores metadata related to registered WordPress users.
10. wp_links Table
This table was used more frequently in older WordPress versions for managing links.
It is no longer commonly used in modern WordPress installations.
11. wp_options Table
The wp_options table stores important website settings and information.
It may include:
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Website URL.
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Administrator email address.
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Plugin settings.
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Theme settings.
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Other WordPress configuration values.
WordPress automatically creates its core database tables during installation.
These tables form an essential part of the WordPress website structure, so deleting them can cause the website to malfunction.
SQL Commands
SQL is the language used to send queries and commands to the MySQL database management system.
For example, an SQL command can be used to delete specific records from a database table.
DELETE FROM wp_comments WHERE comment_date = '10-01-2020';
SQL provides many different commands that can be used to manage stored database information.
However, most WordPress users do not need to edit website data directly using SQL because most actions can be performed from the WordPress dashboard.
Common WordPress Database Modifications
Website owners rarely need to edit their databases directly.
However, database access may sometimes be necessary, especially if the WordPress dashboard becomes inaccessible because of a technical problem.
Important: Always create a database backup before making any direct database changes.
1. Creating a Database Backup
If you do not have a WordPress backup plugin installed, or your website has a technical problem preventing plugins from working, you can manually create a database backup using phpMyAdmin.
Follow these steps:
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Click the name of the database you want to back up.
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Click Export from the phpMyAdmin toolbar.
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Select the export method and format.
You will normally see two main export options:
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Quick: Downloads the complete database using standard settings.
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Custom: Allows you to customize which tables and settings are included.
When selecting Custom, additional settings will appear.
You can choose which database tables should be included or excluded from the backup.
You can also customize the backup filename and other export settings.
To restore a database backup, click Import in phpMyAdmin and upload the backup file.
The backup may typically be in a format such as:
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SQL.
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ZIP.
2. Optimizing Database Tables
Database tables can sometimes be optimized to improve database efficiency.
Open your database, select the desired tables, and choose:
Optimize table
The database management system will perform optimization processes in the background.
This can be particularly useful for websites containing large amounts of data.
3. Changing WordPress User Login Information
Sometimes you may lose access to the WordPress dashboard or need to modify user information directly through phpMyAdmin.
Open your WordPress database and locate the user table, normally called:
wp_users
The table prefix may be different if it was customized during WordPress installation.
The default prefix is usually:
wp_
Open the users table to view registered users.
You will see information such as:
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user_login
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user_pass
Click Edit beside the appropriate user to modify the stored information.
You can also add a new user from phpMyAdmin by opening the users table and selecting:
Insert
Some of the fields include:
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ID: Usually automatically generated.
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user_login: Username.
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user_pass: User password.
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user_nicename: Display name.
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user_email: User email address.
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user_url: Personal website or profile URL.
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user_registered: Date and time the user was registered.
After entering the necessary information, click Go.
You can then open the Browse section to view registered users.
Securing WordPress Databases
The WordPress database contains essential information about your entire website.
Because of this, database security should be treated as an important priority.
Here are some practices that can help improve database security.
1. Change the Table Prefix
The table prefix is the first part of each WordPress database table name.
The default value is commonly:
wp_
Using a customized prefix makes the database structure less predictable.
2. Use Strong Login Credentials
In many hosting environments, cPanel provides access to phpMyAdmin.
This means that anyone with access to your cPanel account may also gain access to your website databases.
Use a strong and unique password for cPanel and keep your login information secure.
3. Use WordPress Security Plugins
WordPress security plugins can help detect suspicious activity and attempts to attack or inject malicious code into your website.
Examples mentioned in the article include:
These security tools can help monitor suspicious behavior and provide additional protection for your WordPress website.
Conclusion
Understanding how WordPress databases work can help you better manage, maintain, and protect your website.
WordPress databases store essential information related to:
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Posts.
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Pages.
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Comments.
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Users.
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Categories.
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Website settings.
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Plugin and theme information.
Whenever you make direct changes to your website database, you should work carefully and create a backup before making any modifications.
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