Power BI datasets
Data used in Power BI reports uses a Power BI dataset. Power BI datasets are basically a connection string and credentials that Power BI uses to connect to a data source. Every report that is created in Power BI must have a dataset associated with it. This ensures the report has data to visualize.
Power BI datasets are often created using the Power BI Desktop tool. At the time a report is published, both the report (containing visuals) and the dataset are published to the Power BI service. It is important to note that credentials are not sent to the Power BI service and must be re-entered upon publishing – this is useful to allow report developers to create reports locally using their own credentials (often with development data sources) but then change the connection string and credentials after reports are published (to production data sources).
Datasets can be used or shared among reports or can come from uploading Excel files to the Power BI service...