Hibernate Tip: How to map an entity to multiple tables

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Today I will answer a question about the mapping of entities to multiple database tables. But before we discuss it in detail, please subscribe and hit the bell icon to get a new hibernate tip video every week.

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  1. Thorben Janssen
  2. JPA
  3. Hibernate
  4. Tips
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Комментарии
Автор

Hi How can you update a column in the secondary table without effecting changes in the primary table. In my scenario the 2 tables are not related

benjamine.ndugga
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Please note that @SecondaryTable annotation will always do left outer join. Or can we do inner joins? let me know

LikhithBC
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Thank you for sharing this tip in a short concise video. Quite useful!!

janettheresjohn
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Ok. It is top to bottom join. What about join of child table to a parent and result set has child table columns, plus some columns from parent table?

olegvorkunov
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I performed a Delete operation on the Entity, but the record is NOT getting deleted from the Secondary Table. Does any other annotation need to be added so that the Delete operation will get cascaded to the secondary table?

chandraprakashjangid
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Excellent quality video, however what about the case you need to map more than 2 tables of the same database?

samuelmora
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Can you use this for more than two (2) tables ?

knowwhere
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Can you help me, what is the emf at this line?
EntityManager em = emf.createEntityManager();

ibrahimcetin
Автор

But what if I only need I'd of child object instead of whole object

shubhamtiwari
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