... The value for the primary key in each row of a table must be unique.In the case of the Customers table, the primary key is the CustomerID column. The key icon shown to the left of the CustomerID ... can think of the foreign key as a pointer from the Orders table to the Customers table. Often, the table containing the foreign key is known as the child table, and the table with the column ... value from -263 (-9,223,372,036,8 54, 775,808) to 263-1 (9,223,372,036,8 54, 775,807). int Integer value from -231 (-2, 147 ,48 3, 648 ) to 231-1 (2, 147 ,48 3, 647 ). smallint Integer value from...