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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

JPA Query Expressions (JPQL / Criteria)

] MEMBER [OF] and the [NOT] LIKE operator. Logical operators: AND, OR, NOT. In addition, JPA queries

Running JPA Queries

this routine operation JPA provides an additional method, getSingleResult, as a more convenient method

JPA Annotations for Value Generation

Reference (JavaDoc) of JPA 2 value generation annotations, including @GeneratedValue, @SequenceGenerator and @TableGenerator.


Explains how to apply server side bulk update using a JPA/JPQL query.


. 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

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

Web App JPA Tutorials

All about Web App JPA Tutorials in Java/JPA database - explanations, examples, references, links and related information.

General JPA Tutorials

All about General JPA Tutorials in Java/JPA database - explanations, examples, references, links and related information.

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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