SQLcl: Make NULLs “visible”

One of the nice features in SQL Developer is to be able to define a value to replace NULLs (for display purpose only) in the data grids. Jeff Smith has a blog post about it in case you are interested.

You can achieve something similar in your SQLcl session by using set null some_string.

And here is  the output from a query after setting the system variable.