what is foreign key
Foreign Key:
It is a column that comes from a different table and
using Foreign key tables are related each other
It is the primary key of another table
It can be duplicate or null for another tablewhat is foreign key
Foreign Key:
It is a column that comes from a different table and
using Foreign key tables are related each other
It is the primary key of another table
It can be duplicate or null for another tableWhat is foreign key?
Foreign Key is a non-key attribute which is derived from the primary key
of another table which links those tables together.Copyright © 2021 Codeinu
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