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<p>In <a href="page.php?w=systems_analysis">systems analysis</a>, a <b>one-to-many</b> relationship is a type of <a href="page.php?w=cardinality_%28data_modeling%29">cardinality</a> that refers to the relationship between two <a href="page.php?w=wikt%3Aentity">entities</a> (see also <a href="page.php?w=entity-relationship_model">entity-relationship model</a>). For example, take a car and an owner of the car. The car can only be owned by one owner at a time or not owned at all, and an owner could own zero, one, or multiple cars. One owner could have</p><p>
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