Outlet         3 rows,  5 columns, key id
Customer     256 rows, 12 columns, key id
Employee      14 rows, 14 columns, key id
Service       12 rows,  3 columns, key id
Bill        2953 rows, 12 columns, key id
Payment     3319 rows,  6 columns, key id
StatusLog   8802 rows,  5 columns, key id
9 relations, delete rule Cascade: Employee_Outlet, Employee_Employee, Bill_Customer, Bill_Employee, Bill_Service, Bill_Outlet, Payment_Bill, StatusLog_Bill, StatusLog_Employee

1. a bill for customer C9999   REFUSED (InvalidConstraintException): ForeignKeyConstraint Bill_Customer requires the child key values (C9999) to exist in the parent table.
2. a second customer C0001     REFUSED (ConstraintException): Column 'id' is constrained to be unique.  Value 'C0001' is already present.
3. a name of 51 letters        REFUSED (ArgumentException): Cannot set column 'name'. The value violates the MaxLength limit of this column.
4. delete customer C0001       OK
   bills 2953 -> 2943, payments 3319 -> 3309, log rows 8802 -> 8772
5. change key C0002 to C0300   OK
   bills of C0300: 21 (C0002 had 21)
