What is it ?
Oracle's Application Express is potentially a very powerful way of building on-demand Applications that run over the Internet. I say 'potentially' because I check every year or so and I am always disapppointed that it failed to perform as advertised.
The last time was about 3 months ago, when I created a Table that HTMLDB refused to find !!!
If you have any good experiences (or bad ones) that you would like to share, please email me

My interest was re-awakened recently when I bought a book called 'Oracle HTML DB Handbook' by the good folks (especially Brad Brown) at TUSC (an excellent organisation). Many of the links in the table below are taken from their book. Beware that for many of the links, you must register with the Oracle Technology Network (OTN) first, (it's free).

Also beware that Oracle is consistent in calling it Application Express, which they abbreviate to 'ApEx', but the book I bought, (published in 2006 and I am writing this in May,2006), calls it HTMLDB. Oracle URLs use 'htmldb' but their documentation uses 'Application Express'.
Today, Amazon sent me the second book published on HTML DB/Application Express, called 'Easy Oracle HTML-DB'. It looks good and I plan to build my first Online Application this afternoon, unless my wife has other plans (which is often the case !!!).
My plan didn't work because the book is not easy at all !

Today, (24th. September, 2006) I bought a new book called 'Hands-On Oracle Database 10g Express Edition', by Steve Bobrowski, published by Oracle. It has a Chapter on how to 'Build an Application with Oracle Application Express'.
I will try it this afternoon,(today it's Sunday, and my wife has just returned from visiting her family in Malaysia so maybe she will be suffering from jetlag and sleeping this afternoon !

Recently, I posted a Question on the Oracle ApEx Forum asking 'Is it safe to trust APEX with mission-critical Applications ?
Currently, 260 people read the question, but only 9 have replied and the consensus is 'Yes'.