Question

what is primary key? explain it in 3 points. ​

Answer 1

primary key is a unique key in database

It contain unique key for each row data

Answer 2

1) We set a field primary key as that field which is unique in the whole record.

2) It uniquely identifies the records in a table.

3) In the student record, we can set primary key as admission no. because it is very unique in the whole record..

Hope it hlpss uuuu..