sql99 / sql3

I just recieved SQL in a Nutshell from O'Reilly.  I bought the book
because it covers the SQL99 standard.  It's my understanding that this
is the most recent SQL standard.  Am I correct about this?  What is the
current status of SQL standards?  What is the most recent approved
standard, and what aspects of SQL are still under discussion?

I ask, because I notice that the book doesn't mention recursive unions. 
In fact I don't see mention of unions at all, nevermind recursive
unions, so this may simply be an oversight.  However, since this is a
feature I've really been looking forward to, I'm now wondering if I'm
hoping in vain.

What organization is currently responsible for drafting SQL standards? 
How can I obtain publications describing those standards?  Is there
anything comprehensive and definitive online?

-Ron-