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FAQ
18

What are the main benefits of using ObjectDB?

that ability and require multiple tables, multiple records and join operations in order to support multiple values (even for a simple data structure such as a collection of strings). In addition
Manual
18

SELECT clause (JPQL / Criteria API)

propagated to the database. Multiple SELECT Expressions The SELECT clause may also define composite ... with multiple SELECT expressions, where custom result objects can provide an object oriented alternative ... of arguments representing multiple selections, and builds a CompoundSelection instance based
JPA Doc
14

Criteria Query Selection and Results

of Expression, any criteria expression can be used as the SELECT clause content. Multiple selection ... of a query with multiple expressions in the SELECT clause) using tuples: The Tuple interface
Manual
14

Database Connection using JPA

functionality for performing operations on a database. Many applications require multiple database connections ... . a pool of sockets), provides an efficient way to construct multiple EntityManager instances
Manual
14

Detached Entity Objects

that are referenced by that field (multiple entity objects can be referenced by a collection field ... that are referenced by that field (multiple entity objects can be referenced by a collection field
Manual
14

JPA Persistable Types

only once even if they are referenced multiple times. Referencing instances of other persistable types from multiple
Manual
14

JPA Primary Key

. Reference to an entity object. Composite Primary Key A composite primary key consist of multiple ... ; : } When an entity has multiple primary key fields, JPA requires defining a special ID class
Manual
14

Query Parameters in JPA

Query parameters enable the definition of reusable queries. Such queries can be executed with different parameter values to retrieve different results. Running the same query multiple times ... of :name itself is String. Queries can include multiple parameters and each parameter can have one or
Manual
14

Running JPA Queries

(with getResultList) The following query retrieves all the Country objects in the database. Because multiple ... on the content of the database. If the database contains multiple Country objects with the name 'Canada' (e
Manual
14

UPDATE SET Queries in JPA/JPQL

variable name) for iteration. Multiple variables and JOIN are not supported. The SET clause defines one or more field update expressions (using the range variable name - if defined). Multiple field update