PBIMCR - Direct Query with Chris Webb 

In DirectQuery mode Power BI does not store any data inside a dataset but instead runs queries against your data source to get the data in needs when a report is rendered. It's very powerful - but you can easily run into performance issues if you do things the wrong way. In this session you'll learn the best practices for using DirectQuery mode in Power BI: how data should be modelled, which properties and settings are important, and when you should use composite models and aggregations.
Chris Webb is a ..
specialist in Power BI, Analysis Services, MDX, Power Pivot, DAX, and Power Query. He's been blogging about Microsoft BI for over 10 years, and racked up over 1500 posts.! He also speaks at a number of conferences including SQLBits, the PASS Summit, the PASS BA Conference, SQL Saturdays and user groups.