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38	JPA Query Structure (JPQL / Criteria) The syntax of the Java Persistence Query Language (JPQL) is very similar to the syntax of SQL. Having an SQL-like syntax in JPA queries is an important advantage because SQL is a very powerful query language and many developers are already familiar with it. The main difference between SQL and JPQL
38	JPA Query Expressions (JPQL / Criteria) ] MEMBER [OF] and the [NOT] LIKE operator. Logical operators: AND, OR, NOT. In addition, JPA queries
38	Running JPA Queries this routine operation JPA provides an additional method, getSingleResult, as a more convenient method
36	JPA Annotations for Value Generation Reference (JavaDoc) of JPA 2 value generation annotations, including @GeneratedValue, @SequenceGenerator and @TableGenerator.
36	UPDATE SET Queries in JPA/JPQL Explains how to apply server side bulk update using a JPA/JPQL query.
20	javax.persistence.criteria.CriteriaBuilder . Since: JPA 2.0 Learn how to define queries using the criteria API in Chapter 4 of the ObjectDB/JPA manual ... - expression Returns: absolute value Since: JPA 2.0 Expression<Y> all( Subquery<Y> subquery) Create ... : subquery - subquery Returns: all expression Since: JPA 2.0 Predicate and( Predicate... restrictions
19	Is ObjectDB better than competing object databases? for the Java Persistence API (JPA). It also supports a more recent and advanced version of the Java Data Objects (JDO) API than competing object databases. By using a standard API such as JPA ... database by using an ORM JPA provider such as Hibernate, EclipseLink or Open JPA. Another advantage
7	Web App JPA Tutorials All about Web App JPA Tutorials in Java/JPA database - explanations, examples, references, links and related information.
7	General JPA Tutorials All about General JPA Tutorials in Java/JPA database - explanations, examples, references, links and related information.
7	Report Generation with BIRT and JPA Demonstrates how to use ObjectDB as a data source of the Business Intelligence and Reporting Tools (BIRT), open source report generator.

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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Copyright © 2003, 2010, 2023 ObjectDB Software, all rights reserved. The JPA API Reference Documentation (JavaDoc) on this website is derived with some adjustments from the open source JPA 2 RI (EclipseLink) and is available under the terms of the Eclipse Public License, v. 1.0 and Eclipse Distribution License, v. 1.0. The JDO API Reference Documentation (JavaDoc) on this website is derived with some adjustments from the JDO 2.2 API and is available under the terms of the Apache License, v. 2.0. Images on this website are available under these licecnes. Documentation on this website explains how to use JPA in the context of the ObjectDB Object Database but mostly relevant also for ORM JPA implementations, such as Hibernate (and HQL), EclipseLink, TopLink, OpenJPA and DataNucleus. ObjectDB is not an ORM JPA implementation but an Object Database (ODBMS) for Java with built in JPA 2 support.