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Kategorie: Informatik

Alles was mit der Informatik zu tun hat

Nach Upgrade nach Fedora 42 Probleme mit der Datenbank MySQL, wegen Downgrading

Nach Upgrade nach Fedora 42 Probleme mit der Datenbank MySQL, wegen Downgrading

Vorneweg, ich habe drei Stunden Troubleshooting gebraucht, also das Lösen des Problems liegen hinter mir. Ich habe mir einen Tag Pause gegönnt, denn es ist höchste Konzentration vonnöten. So etwas macht man nicht nebenbei. Was ist Troubleshooting? Troubleshooting umfasst die Fehlersuche und die Fehlerbehebung und ist ein systematischer Ansatz zur Problemlösung, der häufig verwendet wird, um Probleme in komplexen Maschinen, Elektronik, Computern und Softwaresystemen zu finden und zu eliminieren. Der erste Schritt bei den meisten Fehlerbehebungsmethoden ist das Sammeln von…

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Redirection

Redirection

I can see in my tool here, that a lot of people wanted to see my old blog articles https://sven-essen.de, that I have deleted. I have installed a redirection plug-in that will redirect you to another side. Then I don’t get the error 404 in my statistics, and you can my other sides. Please don’t wonder that you cannot find the site. On the right side you see a magnifying glass where you can search for the article or another…

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Python MySQL create a database and a table

Python MySQL create a database and a table

This is a Python script in order to create first the database and then a table with different values in one step. It is useful, then you don’t need to do it in two steps. What is the requirement for the script Installation of Python Windows and Mac For this script, you need to install Python if you are on Windows and Mac. Go to the official web page of Python.org and download your package and installed like another program….

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How to see your data in a diagram (Pandas and Matplotlib)

How to see your data in a diagram (Pandas and Matplotlib)

Python: My last blog request from the month of September 2025 are now in a script with Pandas and Matplotlib. What is the advantage of this kind of visualization? You are not only independent of the operating system, but also of licence costs and specific software versions, as Python, Pandas and Matplotlib are free and open source software. Excel is only working in Windows and Mac. Linux cannot use Excel as an installed program. Yes, in the cloud, but then…

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Data science Python Pandas, statistics

Data science Python Pandas, statistics

I have created the same script as before now with Python Pandas. What is Pandas? Pandas is a fast, powerful, flexible and easy to use open source data analysis and manipulation tool,built on top of the Python programming language. How I get this pandas? You have to install this module. If you have already installed Python, then you have to install Pandas with the following command in your command line (terminal): pip3 install pandas How to use this module In…

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