Delete Example in JPA

By AmarSivas | Created :2021-01-22 | Updated : 2021-01-22 | Viewed : 380 times

In this current tutorial, we will learn how many ways to delete the entity in JPA.

Table of Contents:

remove() in JPA
Delete Query In Jpa
Delete Multiple Entities In Jpa

remove() In JPA

To delete the entity in JPA we can use the remove() method in JPA. And please find the below-given example snippet code for remove the entity in JPA.

remove() In JPA

transaction = entityManager.getTransaction();
transaction.begin();

Player player = entityManager.find(Player.class, 1000002l);
entityManager.remove(player);

transaction.commit();

Delete Query In Jpa

delete query In jpa

Query query = entityManager.createQuery("DELETE from Player p where p.id = :id");
query.setParameter("id", 1000007l);
query.executeUpdate();

Here used Query class object is created with required for deletion. and applied query execution with query executeUpdate() method.

delete all records in table

Delete all records in the table

Query query1 = entityManager.createQuery("DELETE from Player p");
query1.executeUpdate();

Here we can delete all the records in a particular table.

Delete Multiple Records In Table

List idList = new ArrayList();
idList.add(1000008);
idList.add(1000009);
String idParams = idList.stream().map(Object::toString).collect(Collectors.joining(",")).toString();

//To multiple records in JPA

Query query1 = entityManager.createQuery("DELETE from Player p WHERE p.id IN ("+idParams+")");
query1.executeUpdate();

Here we can delete multiple numbers of records in a particular table. Please refer the Github repository JPA-Remove-Example-App-With-XML