Last word in a sentence: In SQL (regular expressions possible?)

Question

I need this to be done in Oracle SQL (10gR2). But I guess, I would rather put it plainly, any good, efficient algorithm is fine.

Given a line (or sentence, containing

Answer 1

This regex matches the last word on a line:

\w+$

And RegexBuddy gives this code for use in Oracle:

DECLARE
        match VARCHAR2(255);
BEGIN
        match := REGEXP_SUBSTR(subject, '[[:alnum:]]_+$', 1, 1, 'c');
END;