This is a really great idea! I spent a few hours playing around with it today, as I've been looking for a low-boilerplate way to quickly interact with a relational database. I've got a whole load of tables with relationships defined, and I want a nice way to render that.

I really love the idea of having "virgin" SQL statements to get and set the data - doing all the JOINs etc in SQL so I can pull together the view I want from a few interlinked tables. The low effort declarative GUI which interacts with that is nice. It's super-powerful to be able to describe a CRUD app as a set of relational tables, and a set of SQL insert/select statements, and then a very lightweight declarative GUI to start modifying and reading data from it. Then if the app becomes important you can take the same underlying data structure and wrap it in a more established framework with a "real" front end. And if it doesn't, you only spent a few hours on it!

A few thoughts:

1. It took me a while to work out how to render anything. Maybe make the first example you hit in the "Your website's first SQL file" section actually have everything needed to render a page (including "select 'shell' as component")

2. More examples! Maybe a straightforward CRUD type example would be good - it took me a while to work out how to create a row.

3. I want a searchable table of database items with a way to edit each one - maybe an extension to the table view? Either a way to add a custom link to each row in the table, or an extension to it that allows editing of data. That's where a CRUD example would be good.

4. The form should have an input type "multi" which is constrained to the options I've queried from the database. That way I can use the form to insert relational data, or limit users to a set of selections.

5. The "checkbox" type is either whatever it's value is, or NULL. If I've got an integer not null type in the database, I have to coalesce($myCheckbox, 0) when saving it - can you make it have a default unchecked value?

6. The examples are all hard coded data - can you have more examples that use the result of database queries to get the data that's rendered?

It's a fun project though! I like how lightweight it is as well.