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what are primary key and foreign key ?
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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 |
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 |
Answer / sabeena parveen
primary key is an attribute which uniquely identifies each
record in the table.
| Is This Answer Correct ? | 4 Yes | 0 No |
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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