In the 3rdpost in this series, we looked at how we prepare data for use with a concept called the Business Data Vault. Now, in this final part, I will show you the basics of how we project the Business Vault and Raw DV tables into star schemas which form the basis for our Information Marts.Raw Data Mart vs. Information MartsAs of Data Vault 2.0, the terminology changed a bit to be more precise. With DV 2.0 we now speak of “
In my last post , we looked at the basics of modeling your data warehouse using the Data Vault 2.0 technique. This time, we get into the details of how we prepare the DV tables for business user access.What is a Business Data Vault?If you have done any investigation into Data Vault on various blogs or the LinkedIn discussion group, you have seen a few terms used that often cause confusion. These terms include:
In my last post , we looked at the need for an Agile Data Engineering solution, issues with some of the current data warehouse modeling approaches, the history of data modeling in general, and Data Vault specifically. This time we get into the technical details of what the Data Vault Model looks like and how you build one.For my examples I will be using a simplyHuman Resources (HR)type model that most people should relate to (even if you have never worked with an HR model). In this post I will walk through how you get from the
Database design is the process of producing a detailedmodelof a database. This model contains the necessary logical (table names, column names) and physical (column datatypes, foreign keys) choices to translate the design into a data definition language (aka SQL), which can be used to create the actual physical database.When I need to create the design for a new database, in other words, thedata layerfor an application, I follow a fewmentalsteps that I think can help others when they need to go through the same process. And, to be honest, for me, I progress through the first steps mentally without actually working on the technical details – and sometimes at a more subconscious level.
Level:BeginnerSo many organizations face the common problem of storing employee schedules. No matter what institution: a company, a university or simply an individual, many entities need an application to view schedules. Therefore, I will try to come up with a database model and then, in a future article, we’ll talk about a simple application to store employees’ schedules in a database.Currently the design looks as follows:The model is pretty straightforward.Tip – Natural and Surrogate Key Strategies