What is the relationship between fluentform_submissions and fluentform_entry_details table?

If I'm not mistaken, when a form is submitted, all form data including user inputs are stored in the fluentform_submissions table. At the same time, each individual field data is also stored in the fluentform_entry_details table.

Whenever we view Entries in the backend, the data is apparently from fluentform_submissions table as any changes we make in fluentform_entry_details is not reflected.

So what purposes does the fluentform_entry_details table serve?

Also, how do we programmatically update specific entries so that the data in fluentform_submissions is reflected?