First of all, thank you for taking all the lectures in the series. ^^ You can take the entire course in the series, but there are also many cases where you take one course. Since you need to understand the big picture of Excel BI to easily understand the role of each tool, I included the basic concepts that you must know in each course, even if they are duplicated. Since it is an online course, you will be able to quickly skip the duplicated or already known content and listen to the necessary content repeatedly, so I thought it would be better to add rather than subtract. If there was anything you were disappointed with, I ask for your generous understanding. In the case of queries and modeling, if there is an opportunity, I will try to create a lecture by collecting practical application cases.