Derek, thank you I really like what you have done, and for taking the time and going into detail as to what I could do, and for adding the explanation notes on the script this will help me with future DB builds.
I was planning on hiding any buttons that would allow the roster to be edited.as rosters will be imported by csv
I have reattached again and tried with a hidden Tablegrid on form1. I don't know if I can have the Datepicker select first row and click on line with out using mouse to pull the required data, and keeping the Roster tables more like a backend? and if this can be done I have other projects that this could be implemented on.
But you guys are the experts so I'm happy to go with your recommendations.
Regarding ID_Staff key I have edited your Screenshot or is the ID supposed to be Unique?
Thanks for your help