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.

securebit

Database My Admin is a database browser or manager tool for (MySQL and MariaDB) which allows easy way to do INSERT, SELECT, UPDATE, DELETE operations on database from Admin Dashboard.
You can provide limited database access to users or developers you want which can help speed up your work.
<h4>Features :</h4>
<ul>
<li>Allows INSERT, SELECT, UPDATE, DELETE operations</li>
<li>Create new database or tables or columns easily from WP admin dashboard</li>
<li>Give database access to specific WP users</li>
<li>Role Based Access (for Editors, Authors or roles you want)</li>
<li>Features customization supported</li>
</ul>

Database My Admin

Needed to install this plugin on very old WP version (update not an option unfortunatelly), because all other plugins I tried do not work properly under such conditions.

Strangelly it works even on WP 3.4

Database manager, browser for (MySQL and MariaDB). Allows INSERT, SELECT, UPDATE, DELETE operations on database from Admin Dashboard.

DB Viewer vs Database My Admin