grexican

If you’ve ever needed your ACF choices to be dynamically generated by a SQL query, this plugin will help you get the job done.
You can mix and match static choices with dynamic, SQL-based choices by placing as many regular choices in the list as you’d like, followed by the special <code>%%QUERY%%</code> choice that will tell this plugin to load choices dynamically from the database.
An example on how to list users, setting the <code>id</code> as the value, would look like this:
<pre><code>%%QUERY%% : SELECT user_nicename AS text, id AS value FROM wp_users
</code></pre>
<h3>Arbitrary section</h3>

ACF Dynamic Choices

Advanced Custom Fields plugin to allow for dynamic choices (through SQL queries)

Roy Orbitson

<a href="https://www.adminer.org/" rel="nofollow ugc">Adminer</a> is a database administration tool that allows viewing and editing of databases tables, routines, triggers, etc. It also allows running SQL statements to import data, make bulk changes, or perform other complex operations. It is similar in function to phpMyAdmin. It is intended for use by developers and those who have had experience with databases.
This plugin provides a secure connection to your WordPress database, limited to that which is saved in your WordPress configuration, and access is granted only to logged-in accounts that possess the <code>edit_plugins</code> capability (normally admins). This ensures it can only used by those who already have enough privilege to pose a risk to the installation. Each and every request to Adminer will first be authenticated using your WordPress session. Some security plugins impose extra restrictions on admin sessions, so this plugin may not work if you have one installed.
Note that any other databases on the same host and protected by the same credentials will also be accessible in Adminer. This is how databases operate and not a limitation of Adminer nor this plugin. If other databases need different access restrictions, they should have separate credentials.
It comes with all the themes published in Adminer’s Git repository, so you can select a style that suits you.

Database Access with Adminer

Secure and themed, just what I need. Of course I keep this plugin disabled, and only activate when I need to debug something. As an extra protection =)

Themed!

Provides a secure interface to your WordPress database using Adminer, the popular database administration tool.

ACF Dynamic Choices vs Database Access with Adminer