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and retrieve details on managed classes and persistent fields and properties, similarly ... model. Three methods can be used to retrieve sets of types: Three additional methods can be used to retrieve a specific type by

">@Index). retrieve#retrieval_by_navigation_and_access">Transparent activation (no activation depth) - objects are retrieved from the database automatically by retrieve#retrieval_by_navigation_and_access

the database, but is still available after retrieval by a special automatic query. Department entity is retrieved from the database. ObjectDB accomplishes this by effectively ... of the retrieved owner entities can be set by the OrderBy

objects can be deleted from the database by: Retrieving the entity objects into ... >SELECT queries, which are used to retrieve data from the database, DELETE queries do not retrieve data from the database, but when executed, delete specified entity objects from the database

/persistence/update">chapter 2, by: Retrieving the entity objects into ... to retrieve data from the database, UPDATE queries do not retrieve data from the database ... objects in the database using an UPDATE query may be slightly more efficient than retrieving entity

_LockModeType">lock). retrieve#retrieval_by_navigation_and_access">Retrieval by navigation from detached objects is not supported

> Binary AND (&&) Operator The following query retrieves countries ... retrieves countries whose population or area exceeds a specified limit: retrieves all the countries whose population does not exceed a specified limit:

, whereas JPQL works with Java classes and objects. For example, a JPQL query can retrieve and return entity ... /jpa/query/jpql/from">FROM are required in every retrieval query (update and delete queries ... >A Minimal JPQL Query The following query retrieves all the Country objects in

JDO JavaDoc Reference Documentation -

JDO JavaDoc Reference Documentation - PersistenceManager is the primary interface for JDO-aware application components.