You should now have a complete implementation of the first three tables. A useful next step is to import data from the existing spreadsheet into your database tables to populate them. Refer to the instructional video on Blackboard on how to do this, and pay particular attention to the treatment of dates and date formats, and missing values and nulls.  

Further Reading 

•	**CONSTRAINT** and other Commands:    

https://www.h2database.com/html/commands.html