Data & Analytics

WordPress MySQL Database Tables Deep Dive

In this post, I do a deep dive into some of the amazonwebshark WordPress MySQL database tables following the journey of a recent post.

Table of Contents


In January I used Python and Matplotlib to create some visualisations using the WordPress amazonwebshark MySQL database.

Since then I’ve been doing a lot with Power BI at work, so I’ve created a Power BI connection to the amazonwebshark database to reacquaint myself with some features and experiment with a familiar dataset.

I talked about doing a views analysis in January’s post. While some of the 2022 data is missing, I can still accurately analyse 2023 data. I plan to measure:

  • Total views for each post.
  • Total views for each category.

I’ll use this post to examine some of the MySQL tables, and link back to it in future analysis posts.

Let’s begin with a brief WordPress database overview.

WordPress Database 101

In this section, I take a high-level view of a typical WordPress database and identify the tables I’ll need.

There’s plenty of great documentation online about typical WordPress installations. I’m particularly keen on The Ultimate Developer’s Guide to the WordPress Database by DeliciousBrains, which includes an in-depth tour of the various tables.

As for table relationships, this WordPress ERD shows object names, primary keys and relationship types:

I’ll be concentrating on these WordPress tables:

And the wp_statistics_pages table used by WPStatistics.

I’ll examine each table in the context of a recent post: DBeaver OpenAI ChatGPT Integration.


In this section of my WordPress database deep dive, I examine the most important WordPress database table: wp_posts.

Table Purpose

WordPress uses wp_posts to manage a site’s content. Each row in the table is an event relating to a piece of content, like a post, page or attachment. Examples of these events in the context of a blog post are:

  • Creating A New Draft: A new row is created with a post_status of draft. This row is the parent of all future activity for the blog post.
  • Updating A Draft: A new row is created with details of the update. The new row’s post_parent is set to the initial post’s ID.
  • Publishing A Draft: The initial row’s post_status is changed to publish, and the post_date is changed to the publication date. WordPress finds revisions to the post by filtering rows with a post_parent matching the initial row’s ID.

Post Journey

Let’s start by finding DBeaver OpenAI ChatGPT Integration‘s parent row, which is its earliest record. The following query finds rows where the post_title is DBeaver OpenAI ChatGPT Integration, then orders by ID and returns the first result.

  post_title = 'DBeaver OpenAI ChatGPT Integration' 

Note that I order by ID, not post_date. The publication process changes the parent post’s post_date, so I must use ID to find the earliest post.

This record is returned:

Name Value
ID 1902
post_date 2023-02-19 20:28:22
post_title DBeaver OpenAI ChatGPT Integration
post_status publish
post_name dbeaver-openai-chatgpt-integration
post_parent 0
post_type post

So the DBeaver OpenAI ChatGPT Integration parent row is ID 1902. I can use this to count the number of changes to this post by searching for wp_posts rows with a post_parent of 1902:

  post_parent = 1902

81 rows are returned:

Name    |Value|
COUNT(*)|81   |

Now let’s examine these results more closely.

In the following query, I get all rows relating to DBeaver OpenAI ChatGPT Integration and then group the results by:

  • Date the post was made (using the MySQL DATE function to remove the time values for more meaningful aggregation).
  • Status of the post.
  • Post’s parent post.
  • Type of post.

I also count the rows that match each group and order the results by ID to preserve the event order:

  COUNT(*) AS ID_count, 
  DATE(post_date) AS post_date, 
  ID = 1902 
  OR post_parent = 1902 

The query results are below. A couple of things to note:

  • The first two columns show what happens when a post is published. Row 1 is ID 1902 as it has no post_parent, and it has a post_status of publish and a post_date of 2023-02-19.
  • Row 2 is the first revision of ID 1902, and it has a post_status of inherit and a post_date of 2023-02-15. This is why I order by ID instead of post_date – ordering by post_date would show the revisions before the parent post in the results.
  • There are various post_type valves – revisions are text updates and attachments are image updates.
ID_count post_date post_status post_parent post_type
1 2023-02-19 publish 0 post
1 2023-02-15 inherit 1902 revision
19 2023-02-16 inherit 1902 revision
7 2023-02-16 inherit 1902 attachment
24 2023-02-17 inherit 1902 revision
1 2023-02-17 inherit 1902 attachment
7 2023-02-18 inherit 1902 revision
21 2023-02-19 inherit 1902 revision
1 2023-02-26 inherit 1902 revision

Spotlighting some of these results for context:

  • On 2023-02-16 there were 19 text revisions and 7 images attached. I save a lot!
  • On 2023-02-19 there were 21 text revisions and then the post was published.
  • There was a further text revision on 2023-02-26 in response to a DBeaver software update.

That’s enough about wp_posts for now. Next, let’s start examining how WordPress groups content.


In this section, I examine the first of the WordPress taxonomy tables: wp_term_relationships.

Table Purpose

wp_term_relationships stores information about the relationship between posts and their associated taxonomy terms (More on taxonomies in the next section). WordPress uses it as a bridge table between wp_posts and the various taxonomy tables.

Post Journey

In this query, I join wp_term_relationships to wp_posts on object_id (this is ID in wp_posts), then find the rows where either or wp_posts.post_parent is 1902:

  DATE(yjp.post_date) AS post_date, 
  `wp_posts` AS yjp 
  INNER JOIN `wp_term_relationships` AS yjtr 
    ON yjtr.object_id = yjp.ID 
  yjp.ID = 1902 
  OR yjp.post_parent = 1902

wp_term_relationships only contains published posts, so the only rows returned concern the parent ID 1902:

ID post_date post_type post_status object_id term_taxonomy_id
1902 2023-02-19 post publish 1902 2
1902 2023-02-19 post publish 1902 69
1902 2023-02-19 post publish 1902 71
1902 2023-02-19 post publish 1902 74
1902 2023-02-19 post publish 1902 76
1902 2023-02-19 post publish 1902 77

The query returned six distinct wp_term_relationships.term_taxonomy_id values. My next step is to establish what these IDs relate to.


In this section, I examine the table that groups term_taxonomy_id values into taxonomy types: wp_term_taxonomy.

Table Purpose

WordPress uses the wp_term_taxonomy table to store the taxonomy data for terms. Taxonomies in WordPress are used to group posts and custom post types together. Examples of WordPress taxonomies are category, post_tag and nav_menu.

Post Journey

In this query, I add a new join to the previous query, joining wp_term_taxonomy to wp_term_relationships on term_taxonomy_id. Some of the wp_posts columns have been removed from the query to save space.

  `wp_posts` AS yjp 
  INNER JOIN `wp_term_relationships` AS yjtr 
    ON yjtr.object_id = yjp.ID 
  INNER JOIN `wp_term_taxonomy` AS yjtt 
    ON yjtr.term_taxonomy_id = yjtt.term_taxonomy_id 
  yjp.ID = 1902 
  OR yjp.post_parent = 1902

These results give some content to the previous results. I can now see that 1902 has one category and five tags.

ID term_taxonomy_id taxonomy
1902 2 category
1902 69 post_tag
1902 71 post_tag
1902 74 post_tag
1902 76 post_tag
1902 77 post_tag

To get the names of the categories and tags, I must bring one more table into play…


In this section of my WordPress database deep dive, I examine the table that holds the names and details of the taxonomy terms used on amazonwebshark: wp_terms.

Table Purpose

The wp_terms table stores all of the terms that are used across all taxonomies on a WordPress site. Each row represents a single term, and the columns in the table contain information about that term, including name and ID.

Post Journey

In this query, I add another join to the previous query, joining wp_terms to wp_term_taxonomy on term_id.

  `wp_posts` AS yjp 
  INNER JOIN `wp_term_relationships` AS yjtr 
    ON yjtr.object_id = yjp.ID 
  INNER JOIN `wp_term_taxonomy` AS yjtt 
    ON yjtr.term_taxonomy_id = yjtt.term_taxonomy_id 
  INNER JOIN `wp_terms` AS yjt 
    ON yjtt.term_id = yjt.term_id 
  yjp.ID = 1902 
  OR yjp.post_parent = 1902

The results now identify the category and each of the five tags by name:

ID term_taxonomy_id taxonomy name
1902 2 category AI & Machine Learning
1902 69 post_tag WordPress
1902 71 post_tag DBeaver
1902 74 post_tag MySQL
1902 76 post_tag OpenAI
1902 77 post_tag ChatGPT

This is a perfect match for the post’s taxonomy in the WordPress portal:

2023 03 10 WordPressPanelChatGPT

So that’s the categories. What about the views?


In this final section, I examine the WPStatistics table that holds view counts: wp_statistics_pages.

Table Purpose

WPStatistics uses wp_statistics_pages to store data about page views. Each row shows a URI’s total views on the date specified.

WPStatistics documentation isn’t as in-depth as WordPress, so here are the table’s DDL and column descriptions:

CREATE TABLE `1yJ_statistics_pages` (
  `page_id` bigint(20) NOT NULL AUTO_INCREMENT,
  `uri` varchar(190) NOT NULL,
  `type` varchar(180) NOT NULL,
  `date` date NOT NULL,
  `count` int(11) NOT NULL,
  `id` int(11) NOT NULL,
  PRIMARY KEY (`page_id`),
  UNIQUE KEY `date_2` (`date`,`uri`),
  KEY `url` (`uri`),
  KEY `date` (`date`),
  KEY `id` (`id`),
  KEY `uri` (`uri`,`count`,`id`)
Table NameDescription
page_idPrimary key. Unique identifier for the table.
uriUniform Resource Identifier used to access a page.
typeuri type: home / page / post
dateDate the uri was viewed
counturi total views on the specified date
iduri ID in wp_posts.ID

Post Journey

As is the same as, I can use id 1902 in a query knowing it will still refer to DBeaver OpenAI ChatGPT Integration.

For example, this query counts the number of rows in wp_statistics_pages relating to id 1902:

  id = 1902

I can also calculate how many visits DBeaver OpenAI ChatGPT Integration has received by using SUM on all wp_statistics_pages.count values for id 1902:

  `wp_statistics_pages` AS yjsp
WHERE = 1902

So the page currently has 40 views. I can see how these views are made up by selecting and ordering by

  `wp_statistics_pages` AS yjsp
WHERE = 1902 

date count
2023-02-19 1
2023-02-20 5
2023-02-21 1
2023-02-22 4
2023-03-07 6
2023-03-08 3
2023-03-09 2
2023-03-10 1

I can also join wp_posts to wp_statistics_pages on their id columns, bridging the gap between the WPStatistics table and the standard WordPress tables:

  `wp_statistics_pages` AS yjsp 
  INNER JOIN `wp_posts` AS yjp 
    ON = 
WHERE = 1902 
date count post_title
2023-02-19 1 DBeaver OpenAI ChatGPT Integration
2023-02-20 5 DBeaver OpenAI ChatGPT Integration
2023-02-21 1 DBeaver OpenAI ChatGPT Integration
2023-02-22 4 DBeaver OpenAI ChatGPT Integration
2023-03-07 6 DBeaver OpenAI ChatGPT Integration
2023-03-08 3 DBeaver OpenAI ChatGPT Integration
2023-03-09 2 DBeaver OpenAI ChatGPT Integration
2023-03-10 1 DBeaver OpenAI ChatGPT Integration


In this post, I did a deep dive into some of the amazonwebshark WordPress MySQL database tables following the journey of a recent post.

I’ve used this post to present the journey a typical post goes through in the WordPress database. Future posts will use this knowledge and the WordPress database as a data source for various dashboards, scripting and processes. Watch this space!

If this post has been useful, please feel free to follow me on the following platforms for future updates:

Thanks for reading ~~^~~