I am trying to migrate some Employee absence data, from one table to another. The data currently looks like: Employee, Date, Reason ------------------------ dave,01/01/08,sick1 dave,02/01/08,sick1 dave,03/01/08,sick2 dave,04/01/08,sick1 dave,05/01/08,sick1 bob,01/01/08,sick1 bob,02/01/08,sick1...