[fidotron]

This has come up before here, and the recent GNU APL stuff reminded me, but in summary, if you have ever been curious about APL or mildly suspicious of more conventional database approaches you owe it to yourself to take a look at the concepts at work here, especially primacy to columns instead of rows.

The & "where" operator in raw k has stayed with me over the years as a particularly inspired way to deal with column based data.

[profquail]

For those of you curious about array-based / columnar programming languages, there's an APL/J/K reddit: http://www.reddit.com/r/apljk

[tiredandgrumpy]

it came up here before, but this time is different. It is now free for commercial use and is not restricted with timeouts or expiry.