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what are primary key and foreign key ?

Question Posted / a v murugesh

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what are primary key and foreign key ?..

Answer / neo devan

Primary key is the attribute which satisfies both
uniqueness and Not null constraints.
The foreign key is a attribute that points to a valid
column in a parent table.
its used for referencing primary key.

Is This Answer Correct ?    8 Yes 1 No

what are primary key and foreign key ?..

Answer / rukumanikhandhan

primary key is the key which follows uniqueness in the
entire table.
primary key of one table will be called as foreign key in
another table.

Is This Answer Correct ?    7 Yes 2 No

what are primary key and foreign key ?..

Answer / sabeena parveen

primary key is an attribute which uniquely identifies each
record in the table.

Is This Answer Correct ?    4 Yes 0 No

what are primary key and foreign key ?..

Answer / radha

Columns acting as a primary key will always hold unique
values.
Foreign key should always be a primary key of some table

Is This Answer Correct ?    1 Yes 0 No

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