One step forward to manage spreadsheets would be if there was a way to enforce relational database table looking sheets. I mean, you should be able to lock a sh

One step forward to manage spreadsheets would be if there was a way to enforce relational database table looking sheets. I mean, you should be able to lock a sheet in a way that anything you enter to a column must be of same type, you can't addd random formulas wherever, but you need to add data one row at a time, if you miss primary key, no other changes are allowed, if you have a defined formula for a column, it is guaranteed to be the same in all data rows etc.