The Dhubai Metro(UAE) consists of two driverless lines(Red and Green) that totalled 74.694 km (46.41 miles) when the Greenline was officially opened on 9 September 2011.
A database that contains multiple tables related through common fields.
A common field is a field of data that is shared among all forms in a database. Without them, it would be difficult and/or time-consuming to create other forms.