We have all been taught that water freezes at 32 degrees Fahrenheit, 0 degrees Celsius, 273.15 Kelvin. That's not always the case, though. Scientists have found liquid water as cold as -40 degrees F in clouds and even cooled water down to -42 degrees F in the lab.
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.