What is One to Many Relationship?

Submitted by: Administrator
In a one-to-many relationship, each row in the related to
table can be related to many rows in the relating table.
This allows frequently used information to be saved only
once in a table and referenced many times in all other
tables. In a one-to-many relationship between Table A and
Table B, each row in Table A is linked to 0, 1 or many rows
in Table B. The number of rows in Table A is almost always
less than the number of rows in Table B.

example:
authors table
============
author_id (primary key)
lastname
firstname
book_id (foreign key - link to book_id of books table)


books table
===========
book_id (primary key)
title
Submitted by: Administrator

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