As a Data Analyst, I analyze and visualize data in order to answer business questions and to enable data-driven decision making.
📘 Introduction In the following, you will find a fictional e-commerce sales dataset. The dataset describes sales transactions from a fictional online shop that sells merchandise inspired by artificial intelligence, data science, and software development. Its product range includes T-shirts, hoodies, socks, jackets, shorts, caps, and mugs. The dataset...
Introduction Transforming existing columns and creating new ones are essential skills in Power BI. In this hands-on tutorial, we’ll explore how to efficiently add custom columns in both Power Query Editor and the Power BI interface. Since this topic is relevant for the PL-300 exam, this guide...
Introduction Using Quick Measures in Power BI allows you to perform powerful calculations effortlessly. In this hands-on Power BI tutorial, you'll learn how to create quick measures without manually writing DAX. Since this topic is relevant for the PL-300 exam, this guide will be a valuable...
Introduction Statistical functions are fundamental for analyzing and interpreting data in Power BI. In this hands-on Power BI tutorial, we'll explore how to use essential statistical functions in DAX that are commonly used for data analysis. Since this topic is relevant for the PL-300 exam, this...
Introduction Selecting the right column data types in Power BI is essential for accurate data analysis and visualization. In this hands-on Power BI tutorial, we'll explore key data types, how to set them using the Power Query Editor and Power BI Desktop. Since this topic is relevant...
Introduction When working with data in Power BI, it’s essential to assess its quality, distribution, and structure before performing transformations. Power Query provides built-in tools to help analyze data statistics and column properties, ensuring data accuracy and consistency. In this hands-on Power BI tutorial, we’ll explore...
Introduction Errors are an inevitable part of working with data. When preparing and transforming data, you may encounter various errors that can disrupt your workflow. Understanding how to identify, troubleshoot, and resolve these errors is crucial. In this hands-on Power BI tutorial, we’ll explore different types of errors...
Introduction When working with Power BI, one of the key decisions you need to make is how to connect to your data. The two primary storage modes - DirectQuery and Import - each have their strengths and limitations. Choosing the right mode can significantly impact your report’s performance, flexibility, and refresh...
Introduction Slicers in Power BI are essential for filtering and analyzing data, but managing multiple slicers can be a hassle. Instead of clearing them one by one, you can create a Clear Slicer button that allows users to reset all slicers with a single click. This improves usability, enhances the...