Great course. Only one more thing that I would recommend is to use a single example and build up on the same thoughtout the course from working on it in excel to even querying the same in sql.
Another useless course in this specialization. The whole course feels like a PR attempt for Google. They care so much about maintaining the colour palette with blue, yellow, green and red (colours in Google logo) but the content is totally useless. This doesn't provide any value. Anyone who is above 18 will definitely know everything in this course. It's a course for 6th graders.