Getting data from online free Database server (for learning purpose)

Hi lastnn30 ,

You can watch these YouTube videos below, connected to different data sources in Power BI Desktop. At the bottom of the videos there is information about the data source files mentioned in the tutorial, which you can download and use for learning purposes.

1. Connect to Access database

How to connect power bi with Microsoft access database and import data

Access Database in Power BI Online

2. Connect to MYSQL 

How to Connect Power BI with MYSQL Database and Import Data

Power BI Connecting to a database: Connect the MYSQL database to Power BI to build Dashboards

3. Connect to Active Directory

How to connect to Active Directory Domain using Power BI Query Editor

Get Data - Active Directory

And you can review the official documentations to learn how to connect to different data sources...

Data sources in Power BI Desktop

Best Regards