Yeah, the semicolon bothers me too. I'll see how I can incorporate that in. The clicking around was meant to make life easier on mobile phone users. I'll see if I can add a keyboard support without undermining this.

This makes a lot of sense, actually. Definitely great for learning.

You could do it the way Duolingo does it - on desktop, it allows for "Hard Mode", where it lets you type the responses freely. On mobile however, it doesn't let you do that (unless you're using the app).

I agree. I work in Microsoft's SQL Server (incl. variations, e.g. Azure SQL DW) quite a bit. Based on my experience, I am the only person using semicolons in T-SQL.

I always try to use them. It's going to be mandatory says MS:

"Although the semicolon isn't required for most statements in this version of SQL Server, it will be required in a future version."

That has been the guidance for a loooooong time.

I agree with this. I would much prefer if there was a freeform query mode, where I could just type the queries without the buttons or hints.

Yes! Part of learning a language, for me, is gaining muscle memory with my fingers and having to use a mouse is a turn off. Very cool site otherwise!

I was trying to determine how to use a comma.