There is a very active community around PowerBI with many sites specializing in different aspects of the product. The following 4 resources are ones I always fall back on recommending that provide both beginner and advanced users learning resources.
Posts from the ‘PowerBI Field Guide’ Category
The date dimension is the table that controls your time analysis and the most important to get right, especially with PowerBI and other visualization tools. Having various tags and descriptors that aid in your analysis gives your end users several options in creating their visualizations in addition to a base for DAX time intelligence calculations.
There are times when, as a consultant, you have to produce a demo or training database that has no relation to the client that you are doing the work for. This can be due to security or confidentiality of the data. I try to produce training and samples that at least have realistic values so that the people involved have a frame of reference.
If you have an excel table that is built for data entry, it may not be in the best format for data analysis or your data model. By using Query Editor, you can keep the original table and create a version that you can use for analysis as a dimensional fact table.
How do I make it easy for the end user to move the source Excel File around while making it easy to update the source location in PowerBI? Query Parameters solved that issue making the solution a lot easier to maintain.