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what do we use to refer to a single entry in any table?

In a Relational database, what do we use to refer to a single entry in any table?

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A.
primary key

B.
foreign key

C.
index key

D.
row property

E.
column property

F.
row ID

G.
col ID

Explanation:
Primary and foreign keys are what make relational databases possible.
We use primary keys to refer to a single entry in any table, and we can use foreign
keys to reconcile related data between two or more tables.


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