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A named query is a statically defined query with a predefined unchangeable query string. Using named queries instead of dynamic queries may improve code organization by separating the JPQL query strings from the Java code. It also enforces the use of query 

processes JPQL (JPA Query Language) and JDOQL (JDO Query Language) queries directly, where ORM tools

The following JPA annotations are designated for SQL queries on relational databases: ObjectDB supports only the preferred JPA query language, JPQL, and silently ignores all the above annotations.

;Explains how to use the JPA Query Language (JPQL).

of rich complex queries, using two standard Java query languages: JPQL (Java Persistence Query

JPA defines dozens of annotations that can be divided into the following groups: Annotations for JPA aware classes: JPQL Queries"> Annotations for fields in JPA

> Learn how to define and use JPA/JPQL queries in ... "> ObjectDB Notes: Learn how to define and use JPA/JPQL queries in

and use JPA/JPQL queries in Chapter 4 of the ObjectDB/JPA

JPA criteria API's Join in jpql/from">Chapter 4

> The database in this tutorial contains Point entity objects. We will use a simple JPQL query