Are business Dashboards easy to design? You tell me: you’ll need to draw a clear picture of the most valuable information about a business subject, in less than a minute. Of course, it should also be visually appealing, interactive, quick, and self-explanatory, what else?!
Although for many designers the Dashboards conception and development are intuitive activities, especially since the explosion of friendly tools and self-service BI, I believe that some guidelines and a methodology are necessary. To make a difference in the field we need to define our own style, our signature.
I have constantly been trying to “discipline” myself…
Sometimes we need to generate big amounts of data with different data types, to help us with the development, to test, debug, tune the performance of our queries, data processes, algorithm.
In this post I want to share a simple way to do it, starting from a simple and little data set.
If you want to try it yourself, here is the script to build from scratch the table, and…
In this post I want to share with you a way to get started with Tableau, by showing the 3 mains steps necessary for any data visualization.
I recommend getting and installing the free version of Tableau (we’ll this as well), to practice the 3 steps yourself.
If you want…
· Concepts explained
Dealing with dates is not always immediate. There are cases, for instance when we prepare our data for a time series visualization in a dashboard, in which we need to adapt our dates so that overlapping time periods are merged.
In this post we use the concepts of CTEs and subqueries to deal with date merging.
We consider the following table “TimePeriods”, in which each row has two dates, representing the start and end of periods.
Notice that some periods are overlapping:
In this series we look at all sorts of SQL features, by doing examples from real world scenarios.
Ranking values is a very common task. By ranking we make our SQL query doing useful things
In this post we will look at some different ways to define a rank in SQL., …
Design is one of the essential factors of a successful dashboard. At least as much as its content and the quality of the underlying data. Whereas the dashboard’s content and data quality are clearly measurable, design is more difficult to evaluate objectively, but fortunately we have some guidelines.
Why boring dashboard are boring? Why engaging dashboards are engaging? Dashboard designers need to know what can push a data visualization to rank low or high in the user’s appreciation range.
Some empiric but effective ideas that can give Dashboard design hints are the “Conventional” and “Gestalt” principles.
In this story I…
Tableau recently released a new feature “Quick LOD” that should make it easier to build LOD calculations. As an intensive LOD user, I want to try this feature out and share my thoughts with you.
When we build a data visualization we often need to dispose of multiple aggregation levels of the same measure at the same time, by using LOD calculations.
If we make a conceptual parallel with SQL, LOD expressions allow defining more than one different GROUP BY clauses in…
In this story I want to share a possible way to tackle the tricky understanding of complex (or complicated) SQL queries. When we need to handle some existing SQL code, maybe non-documented, poorly written, or uses SQL versions that we don’t master just yet, it can be frustrating to deal with it.
Whatever thing we need to do with it, just running it as it is, using it in a Data Science or Analytics process, modifying it, etc., in any case we need to understand it.
New data specializations always offer opportunities to the ones who can see them coming.
In this 2-parts story, I want to share some ideas about Self-Service Analytics.
In Part-1 I give an overview of what SSA is, explain the opportunities it offers to Data passionates, and walk through the subjects one needs to learn or improve to work in Self-Service Analytics.
In Part-2 I look in more detail at the needed skill sets, toolkits, and possible entry points to plan the SSA learning.
I call “Self-Service Analytics” the stack techniques and skills that allow anyone (not only technical users) in…
In general, a data model is a representation of how data is organized into database tables. I know, that’s not a rigorous/academic definition, but my only goal here is to be clear. For a given collection of data, representing a Business Process, there is a number of possibles ways to organize store them: do we store all data in 1 big table? Or in 2, in 100,.. ? It depends. For any Data Analytics- driven subject, ranging from classic Business Intelligence to the wildest Data Science applications, a very comfortable and efficient way is using Dimensional Modeling.
The topics will…
Data freelance. Data literacy evangelist. Math & music hobbyist.