postgresql - How do I create and manage custom SQL functions in CartoDB?

I'm working through a CartoDB tutorial at the moment, and got to the point of creating a custom SQL function.

Do I just write this in the "CUSTOM SQL QUERY" Field on the right of my table? How do I edit previously created functions?

Answer

The Custom SQL query panel of the CartoDB user interface isn't tied to any particular table, but it commonly is used to select the single table you are currently looking at.

So with that, yep, just drop your custom function in their and run it. After it is loaded into your database, you should be able to go back to selecting from your table just like normal.