Accessing data in Google Drive tables with Google

How can I access the data contained in Google drive tables?

I created some basic apps after reading the tutorials, but I'm unable to to see the sample data I entered.

Option 1: Don't use Drive Tables

App Maker gives you power to connect to Cloud SQL instance, that you can access through Cloud Shell or connect with some tools like MySQL Workbench.

Pros

Works nice if you have your own Cloud SQL instance

Cons

This approach falls short in environments with shared Cloud SQL instances
Cloud SQL is not free

Option 2: Export data to spreadsheet

Regardless what data backend you are using you can dump all your data to spreadsheet.

Cons

Basically it is one-way data access (read only), unless you want to mess with importing edited data back to your deployemnt...

Option 3: Drag'n'drop way

There is an option to keep Debug page and drop on it tables/forms for models you want to look it.

Pros

Seamless access to data directly from you development environment (browser).

Cons

It is hard to maintain such Debug especially when you are actively working on your database structure.
Need to think about security and hide the page from your end users.
Need to keep dedicated datasource(s) for the debug tables/forms, that should have no filters applied (at this time there is no client-side analogue of app.models.MyModel.newQuery() server-side API).

Option 4: Drag'n'drop way (advanced edition!)

The basic idea is to create a page with dynamic table (to view/edit data) and form (to add records). Using this highly dynamic page will eliminate shortage #1 from the option #3:

This approach has similar pros and cons as previous one plus there are some App Maker limitations that make it hard to implement (but it is doable on some extent).