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What is one-to-one association? |
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Answer» A one-to-one association is similar to many-to-one association with a difference that the column will be set as unique. For example an address object can be associated with a single employee object. <many-to-one> element is used to define one-to-one association. The name attribute is set to the defined variable in the parent class. The column attribute is used to set the column name in the parent table which is set to unique so that only one object can be associated with an other object. |
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