Pretty easy, overall.
All of the SQL statements are very common and can be found in any SQL statement book. The queries are difficult to find. Just stay focused and don't get frustrated, it will all come together.
One of the things for me was to make sure that your syntax for you sql statements are textbook. There are different ways to get your query to work. So, keep that in mind when turning in you projects.
Hours per week:
Advice for students:
Make sure to get MSSQL server express for free to take full advantage of the course. The course is not that difficult if you take some time to learn the SQL syntax.