Look For Clues in the
Design
2.
Try it: Return to the Design View
Go to
Home ->Views->View.
Select a
View:
Design View.
Try
This, Too: Find the Primary Key
Select a
Field: ID
What Do
You See? The ID Field is different from the Text Fields we have
been editing.
This is
the Primary
Key. The Primary Key uniquely identifies each record. It is an
Integer, a Whole Number.
A Primary Key
cannot be empty, or null. The value entered for the Primary Key
cannot be duplicated.