Literals, spaces, and the TITLE phrase can be included in the operation definition to format the result heading and improve readability.
For example, the following definition returns side titles, evenly spaced result strings, and a blank heading.
SELECT ('Sex ' || sex ||', Marital Status ' || mstat)(TITLE ' ')
FROM Employee ;
Sex M, Marital Status S
Sex F, Marital Status M
Sex M, Marital Status M
Sex F, Marital Status M
Sex F, Marital Status M
Sex M, Marital Status M
Sex F, Marital Status W
...