How do I add a column that doesn't come from a table to a query?

I'm a total newbie to Web Intelligence Documents and to this forum.  I am familiar with SQL and I'm trying to figure out the equivalent of a simple query like this:

SELECT 'test' AS myColumn

The SQL Viewer lets me see the sql generated by a query, but not edit it.  It would be a simple matter to accomplish my goal if I could.

Thanks in advance for any guidance.