Design on FromDual GmbH

Architecture and Design decisions

oli.sennhauser@fromdual.com (Oli Sennhauser) — Mon, 13 Jan 2020 09:00:31 +0000

When it comes to MariaDB/MySQL Database consulting engagements we often see, that our customers are very confused by many different technologies advertised to them.

Storing BLOBs in the database

oli.sennhauser@fromdual.com (Oli Sennhauser) — Fri, 30 Jun 2017 14:18:07 +0000

We have sometimes discussions with our customers whether to store LOBs (Large Objects) in the database or not. To not rephrase the arguments again and again I have summarized them in the following lines.

Using NULL as default values

oli.sennhauser@fromdual.com (Oli Sennhauser) — Thu, 21 Jul 2011 18:35:34 +0000

Abstract:

It is common practice in MySQL table design that fields are declared as NOT NULL but some non-sense DEFAULT values are specified for unknown field contents. In this article we show why this behavior is non optimal an why you should better declare a field to allow NULL values and use NULL values instead of some dummy values.

Data Warehouse Design

oli.sennhauser@fromdual.com (Oli Sennhauser) — Wed, 16 Jun 2021 23:02:43 +0200

This is my cheat sheet for dimensional modelling design techniques of a data warehouse (DWH) according to Kimball/Ross.