Recently we had some clients who had the desire to store timeseries in PostgreSQL. One of the questions which interested them is related to calculating the difference between values in timeseries data. How can you calculate the difference between the current and the previous row? To answer this question I have decided to share some […]

By Kevin Speyer – Time Series Forecast – This post shows you how to approach a time series problem using machine learning techniques. Predicting the behavior of a variable over time is a common problem that one encounters in many industries, from prices of assets on the stock market to the amount of transactions per […]

UPDATED July 2023: Window functions and analytics have been around for quite some time and many people already make use of this awesome stuff in the PostgreSQL world. Timeseries are an especially important area in this context. However, not all features have been widely adopted and thus many developers have to implement functionality at the […]

Timeseries are an increasingly important topic – not just in PostgreSQL. Recently I gave a presentation @AGIT in Salzburg about timeseries and I demonstrated some super simple examples. The presentation was well received, so I decided to share this stuff in the form of a blog, so that more people can learn about window functions […]

I have already written about timeseries and PostgreSQL in the past. However, recently I stumbled across an interesting problem, which caught my attention: Sometimes you might want to find “periods” of activity in a timeseries. For example: When was a user active? Or when did we receive data? This blog post tries to give you […]

UPDATED August 2023: Analyzing timeseries is critical. For basic timeseries, ordinary analysis is definitely more than sufficient. Additional tooling is in many cases not needed to get things going in a fast and professional way. In this article, I want to share a simple yet powerful idea which can help to look for trends or […]

UPDATED August 2023: Time is one of those unloved topics every programmer has to deal with. Have you ever written a routine heavily dependent on time calculations in C, Python, PHP, Perl, or any other language? In that case, I’m sure you’ve fallen in love with time management as much as I have. When it […]

Everybody needs a little toy to play with, so I thought: Why not buy a toy helping me to get rid of my energy bill? So, I ordered a 10.5 kWp photovoltaic system for my house. The system was shipped with a Kostal Pico inverted to make sure electricity can be used directly by the […]