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5 Cards in this Set
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Use of <join> element
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To map properties of one class to several tables that have a one-to-one relationship
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Use of <property> element
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to declare a persistent JavaBean style property of the class
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Use of <many-to-one> element
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* To declare an ordinary association to another persistent class.
* The relational model is a many-to-one association * A foreign key in one table is referencing the primary key column(s) of the target table |
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Use of <one-to-one> element
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To declare a one-to-one association to another persistent class
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The two varieties of one-to-one associations
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* primary key associations
> the two table rows share the same primary key value * unique foreign key associations > a foreign key with a unique constraint > e.g. <many-to-one name="person" class="Person" column="PERSON_ID" unique="true" |
