Is there an online compiler for multiple programming languages?

 Yes. There is indeed one I recently came across. It can compile a couple of programming languages as shown here (copied from its website).

I just tested a demo SQL query. It worked.

It has a simple interface. Just enter your code and click RUN and you are done.

Just click RUN after entering your code as shown (I just modified the demo query a little bit).

The result of the query is shown. I have not tested other languages.

Here is the site where you can do it. You need to register to use this program.

https://www.mycompiler.io/new/sql