On Tue, 10 Aug 2010, Thomas Kellerer wrote:
No. It's built in (8.4) and it's called Windowing functions:
http://www.postgresql.org/docs/8.4/static/tutorial-window.html
http://www.postgresql.org/docs/8.4/static/functions-window.html
SELECT group, last_value(value) over(ORDER BY number)
FROM table
I may be mistaken, but as I understand it, a windowing function doesn't
reduce the number of rows in the results?
Matthew
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