To get all values in a specific field from all records in a module

To get all values in a specific field from all records in a module

Hello,

I am a beginner and I do not know very well that great tool, which is why I ask you about a specific case but must be fairly common.

I created a module with fields. I created records in this module.
I need to get the value of one of these fields for all the records and list them in the field as a drop-down list that is in another module.

How can I do this?

Thanks a lot for your help.

Best,
Eric