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# Data Persistence and ORM
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Quarkus provides Hibernate ORM integration with Panache for simplified data access, transaction management, and support for both imperative and reactive database operations.
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## Panache Entity Framework
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### PanacheEntity Base Class
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```java { .api }
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public class PanacheEntity {
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    public void persist();
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    public void delete();
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    public static <T extends PanacheEntity> List<T> listAll();
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    public static <T extends PanacheEntity> T findById(Object id);
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    public static <T extends PanacheEntity> long count();
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    public static <T extends PanacheEntity> List<T> find(String query, Object... params);
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    public static <T extends PanacheEntity> T findFirst(String query, Object... params);
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}
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```
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Base class providing active record pattern for entity persistence.
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### PanacheRepository Interface
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```java { .api }
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public interface PanacheRepository<Entity> {
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    void persist(Entity entity);
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    void delete(Entity entity);
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    List<Entity> listAll();
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    Entity findById(Object id);
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    long count();
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    List<Entity> find(String query, Object... params);
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}
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```
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Repository pattern interface for data access operations.
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## Transaction Management
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### @Transactional Annotation
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```java { .api }
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@Target({ElementType.TYPE, ElementType.METHOD})
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@Retention(RetentionPolicy.RUNTIME)
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public @interface Transactional {
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    TxType value() default TxType.REQUIRED;
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    Class[] rollbackOn() default {};
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    Class[] dontRollbackOn() default {};
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}
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```
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Standard JTA transaction management annotation.
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**Usage Example:**
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```java
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@Entity
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public class User extends PanacheEntity {
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    public String name;
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    public String email;
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}
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@ApplicationScoped
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public class UserService {
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    @Transactional
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    public User createUser(String name, String email) {
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        User user = new User();
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        user.name = name;
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        user.email = email;
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        user.persist();
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        return user;
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    }
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}
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```