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Asked: 2026-06-11T01:42:01+00:00

In Database, I have a customer entity and a event entity. There is a

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In Database, I have a customer entity and a event entity. There is a MANY-TO-MANY relation between them called reserve.

reserve has three columns, CUSTOMER_ID, EVENT_ID and SEAT.

The first two columns are primary keys of each entity. The third one is a relational attribute that’s set specifically for the relation, so it is ONLY in the relation table.

What I am struggling is should I create a separate class for the reserve or should I do some trick in the two existing two classes to make this third one exist?

Thanks.

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1 Answer

  1. Editorial Team

    A many-to-many relation table must have only two attributes: the two primary keys of the tables that should be linked. In your case, since you store another attribute within that relation table, it’s not a pure relation table and you have to create a extra POJO for it. As far as I know.

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