Question

what is primary key and foreign key? plzz guys.​

Answer 1

Answer:

A foreign key is a column or a set of columns in one table that references the primary key columns in another table. The primary key is defined as a column (or set of columns) where each value is unique and identifies a single row of the table.

Answer 2

Answer:

Primary key uniquely identify a record in the table. Foreign key is a field in the table that is primary key in another table.