Tag: analytical function
A nice SQL challenge was presented to me by a colleague. The challenges basically consisted of this table. A table contains records that describe login events. Each record has …
Tag clouds are a special way to present information about a set of records. Tags are descriptive labels that are associated with specific records. A tag cloud visualizes the …
Few things lend itself so well to SQL explorations as sport related data. The imminent World Cup Football (or Soccer in some deprived parts of the world)2014 in Brazil …
During the OUGF 2014 Harmony Conference in Finland, I attended a seminar by Chris Date on Temporal Data and the Relational Model. He introduced an approach within the relational …
The speed of cars can be detected at large distance and with great accuracy using laser speed guns. How the measured speeds translate into speeding tickets depends on the …
One of the very nice new features in SQL in Oracle Database 12c is the MATCH_RECOGNIZE operator. MATCH_RECOGNIZE adds a facility for spotting patterns in records. This allows us …
We all know a lot of money is involved with professional sports. One of Europe’s major sports is football (or soccer as some like to call it). A lot …
Gantt Charts in ADF are interesting components to visualize data that is organized according to time. The Gantt Charts have a horizontal time axis. In rows along the vertical …
The challenge in this article is a simple one. I have a table with records (duh!) and each record describes the occurrence of a certain payload. In this example …
In a recent article – Advanced SQL to find valid periods – juggling with outer joins, running totals and analytical functions – I discussed how to use Analytical Functions …
After teaching the Advanced SQL Masterclass recently, one of the attendees confronted me with an interesting challenge for me to solve with all the tools I had been discussing …
Of je nu ‘klassieke’ Oracle applicaties ontwikkelt, met APEX bezig bent, een SOA landschap inricht of een Java/JEE (bijvoorbeeld ADF) applicatie bouwt: het fundament van veel van wat je …
Some IT organizations that I visit have a sign somewhere indicating the number of days that have passed without a major issue. Production sites with proper respect for health …
It is a strange thing really: querying the database to find missing data. Queries usually report on what is there. Not the queries in this article (and its prequel): …
On our blog, we have been discussing the new hierarchical query functionality in Oracle Database 11g Release 2, using Recursive Suquery Factoring. Instead of using CONNECT BY and its …
You are probably familiar with the FIRST_VALUE and LAST_VALUE analytical functions that were introduced some time ago into the Oracle RDBMS, in the 9iR2 release I believe (or at …
Last week, this weblog hit the 9M post reads mark. Since we started technology.amis.nl/blog in July 2004, it took us some 5 years to get to that point. …
One of the intriguing subjects at last weeks Oracle Open World conference for me was Complex Event Processing. The ability to process streams of real time events, and up …
I will attempt to introduce analytical functions in a step-by-step manner. A first step into Analytical country could be the following, starting from a very simple aggregation query, exploring …
![AMIS Masterclass Advanced SQL – scherp je SQL skills in een pittige en praktijkgerichte dag – maandag 10 december]({"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"http:\/\/seattletimes.nwsource.com\/ABPub\/2012\/08\/02\/2018836700.jpg","focal_length":"0","iso":"0","shutter_speed":"0","title":"","orientation":"0"} "AMIS Masterclass Advanced SQL – scherp je SQL skills in een pittige en praktijkgerichte dag – maandag 10 december")