In my last post, I wrote about a dream of a European version of ODTUG Kscope conference - working title "Escope." ;-) We're trying to determine whether it would be feasible to create such a conference - if you haven't already, go and fill out the survey and help us find out if there's basis for the dream.
The heart of row pattern matching is finding which row matches what part of the pattern. Within the 12c MATCH_RECOGNIZE clause, DEFINE lists the conditions a row may meet; it doesn't always work the way you expect, especially if you use aggregates in the condition.
This how you install SQL Developer on Mac OS Yosemite. The first thing you need to do is download and install Java 8, not Java 7 on your Mac OS Yosemite as suggested on some web sites. You can determine whether or not Java is installed by running the following command:
Virtual Columns are really cool. I like them a lot. If you've never heard of them, shame on you, learn about them. In short: a Virtual Column is not a real column, it's an expression that looks like a column... more or less. While using the Virtual Columns, we ran into a little oddity with them.
I forgot to add a MATCH_RECOGNIZE solution to my last post on merging overlapping date ranges! That should take me just a few minutes, right? Wrong: it’s not that easy and here’s why. For test data, please refer to the previous post. To Merge or not to Merge? The idea is to merge date ranges if […]