I just wanted to share really quick a pretty cool way to use google docs as a database.
Using sheetsu.com you can create an API from a google sheet that allows you to post to and manipulate data in a google doc thru an API: http://sheetsu.com
In their Beta API https://sheetsu.com/docs/beta there is support for different methods other than just creating new rows.
I tested it in a prototype:
The form data here gets sent to a google sheet and then on another page the data is displayed by pulling the data from the google sheet:
I tested the PATCH feature of the sheetsu api for implementing a like button as an example.
Just thought I'd share as I think this is really useful for prototyping and could help others.