Fabricio Carella

This plugin will allow you to execute any type of SQL query into the WordPress’s DB connecting through the driver provided by the MySQLi extension without the need to use another tool like phpMyAdmin.
It also gives you the ability to export the results in a CSV format file.
In order to access this plugin’s admin page (Tools -> Run SQL Query), your account needs to have the <code>install_plugins</code> capability, that means a Super Admin in the multi-site installation or an Admin in a single site.
Feel free to contribute: 
https://github.com/Sefirost/run-sql-query
Use on you own risk. Under no circumstances will the Author of this plugin assume responsibility or liability for any damages or destructive effects on the database resulting from the queries executed using this tool.

Run SQL Query

Run SQL Query is a simple plugin to quickly execute any type of SQL query into the WordPress's DB and export the results in a CSV format file.

GrandPlugins

DB Viewer lets you securely view your WordPress database directly from your website’s dashboard — no need to log in to your hosting account or use phpMyAdmin. Perfect for quick inspections and monitoring.
With the free version, you can:
<ul>
<li>Browse and view any database table </li>
<li>Inspect table structures and content inside WordPress </li>
<li>Safely explore your data without leaving the dashboard </li>
</ul>
🔥 Upgrade to <a href="https://grandplugins.com/product/wp-db-controller/" rel="nofollow ugc">DB Controller PRO</a> to unlock powerful database management features:
<ul>
<li>Empty any table with a single click </li>
<li>Delete tables you no longer need </li>
<li>Rename tables instantly </li>
<li>Search for any value across all columns </li>
<li>Add new rows directly from the dashboard </li>
<li>Edit any existing row inline </li>
</ul>
This makes the PRO version a complete lightweight alternative to phpMyAdmin, built directly into WordPress.

DB Viewer

View your WordPress database directly inside your Dashboard. No need for phpMyAdmin or hosting panels.

Run SQL Query vs DB Viewer