Hello There, Oracle SQL Queries based on scenarios being contrived to exist for many projects simply so it can be run will be the first to hit the wall, but those projects where the functions to make existing transactions cheaper in real world applications will find the elusive real world demand.

Analytic Functions in SQL 2012 - Part 2 - LEAD and LAG In the Part 1 of this series we looked at how to get the extreme (Maximum, Minimum, Least, Most, etc) records from an ordered list using two fnctions First_Value and Last_Value. a positive integer of length 1, giving the number of positions to lead or lag by. default. value used for non-existent rows. Defaults to NA. order_by. override the default ordering to use another vector... Needed for compatibility with lag generic.