I have been using this plugin for quite some time, and I love it.
There are some customized features, that I have been using other frameworks for, and I am wondering if its possible to achieve with ACF.
When I create a select field, is it possible to set the options of the select with database query of results from a custom table that I created? I know I can do custom relations to posts and tax, but what about custom created tables?
Not sure what you’re asking.
If you want ACF to save values to a custom DB, it will not do this on its own.
If you want to populate the choices of a select field, you can populate them from anywhere as the code to do the populating is completely up to you https://www.advancedcustomfields.com/resources/dynamically-populate-a-select-fields-choices/
Yes, I wanted to populate choices.
It worked with me, the plugin is now highly reliable for me.