A) The primary key of one table should be dragged into the foreign key of another table
B) Select a field from parent table and make it the foreign key of the child table
C) Drag the foreign key of one table in all tables that are used
D) All of these
Correct Answer: A
Solution :
A primary key's main features are: It must contain a unique value for each row of data. It cannot contain null values. The foreign key is defined in a second table, but it refers to the primary key in the first table.
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