Preparation for migrating data to Oracle Virtual Private Database

Jacco Cijsouw

  preparation for migrating data to Oracle Virtual Private Database Introduction Recently I was part of a team involved in the preparation of migration data belonging to multiple business units into a single Oracle 19c database with Virtual Private Database (VPD). The VPD solution is used for the virtual separation […]

How to unit test a SQL query?

Lucas Jellema 7

A simple challenge: I am working on a SQL query. Not a trivial query. I am trying various approaches. I believe I may have found a solution that works. That produces the correct solution. How can I be sure? How can I try to further refine the query while maintaining […]

Introduction to Oracle Machine Learning – SQL Notebooks on top of Oracle Cloud Always Free Autonomous Data Warehouse

Lucas Jellema

One of the relatively new features available with Oracle Autonomous Data Warehouse is Oracle Machine Learning Notebook. The description on Oracle’s tutorial site states: “An Oracle Machine Learning notebook is a web-based interface for data analysis, data discovery, and data visualization.” If you are familiar with Jupyter Notebooks (often Python […]

Some Notes on my small steps with Oracle APEX

Lucas Jellema 1

In this article, I will share some of my personal findings and discoveries as I start out building a small APEX application. No experienced developer is likely to learn anything from this article – but first timers like me could perhaps benefit from my findings. Some of the challenges I […]

Introducing Elastic Search NoSQL to Oracle SQL developers – comparing dozens of ElasticSearch and SQL operations (a bit like Rosetta)

Lucas Jellema

Even for organizations with strong roots in relational databases such as Oracle RDBMS, there may be valuable opportunities for leveraging additional data sources, for example to support special (search) use cases. Elastic Search (Index) is one of those data stores that can add value – for example to provide powerfur […]

Oracle REST Data Services (ORDS)

Marc Lameriks 3

While preparing for writing an article about “Oracle API Platform Cloud Service” I wanted to quickly be able to generate example JSON payload’s based on some tables in the “HR’ schema. To achieve this, I came across “Oracle REST Data Services (ORDS)” and wanted to know more about it. In […]

SQL Challenge: Drilling down into World Cup Football Tag Cloud

Lucas Jellema

In a previous article, I have introduced the World Cup Football tag cloud (https://technology.amis.nl/2014/06/22/sql-challenge-dynamically-producing-a-tag-cloud-for-world-cup-football-matches/). I have shown how tags can be associated with football matches, both explicitly and implicitly – the latter derived automatically, based on the structured information about the matches. The tag cloud can be used as a […]