Separating Programming from Presentation

"In other words, Velocity doesn't remove programming from presenation; rather it requires users to learn a new ad hoc scripting language. By requiring Web page designers to learn the Velocity Template Language, Velocity fails to eliminate the mingling of the content and presentation." http://www.learningace.com/doc/5903174/2b2d80be66064d5c810bebcd444b927c/j-jsptags

Oracle Subqueries

Use a subquery to populate the column, and specify the value that you want returned for a missing value (except if you have Oracle, because its Subquery processing is even worse than its set processing).

http://stackoverflow.com/a/4358687/2066936