About Group Id

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Tutorial
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Step 2: Entity Class and Persistence Unit

; import javax.persistence.Id; @Entity public class Guest implements Serializable { private static final long serialVersionUID = 1L; // Persistent Fields: @Id @GeneratedValue Long id; private String name; private Date signingDate; // Constructors: public
Tutorial
4

Getting Started with JPA and Eclipse [2011-02-04]

. For this tutorial, besides the Java JDK (5 or above) and the Eclipse IDE (either Eclipse IDE for Java EE Developers or Eclipse IDE for Java Developers), you only need to download and extract the ObjectDB
Tutorial
4

Getting Started with JPA and Eclipse [2018-10-20]

. For this tutorial, besides the Java JDK (5 or above) and the Eclipse IDE (either Eclipse IDE for Java EE Developers or Eclipse IDE for Java Developers), you only need to download and extract the ObjectDB
Tutorial
4

Getting Started with JPA and Eclipse [2018-10-20]

. For this tutorial, besides the Java JDK (5 or above) and the Eclipse IDE (either Eclipse IDE for Java EE Developers or Eclipse IDE for Java Developers), you only need to download and extract the ObjectDB
Manual
4

JPA Query Expressions (JPQL / Criteria)

Query expressions are the foundations on which JPQL and criteria queries are built. Every query consists of clauses - SELECT, FROM, WHERE, GROUP BY, HAVING and ORDER BY, and each clause consists of JPQL / Criteria query expressions. Atomic Expressions The atomic query expressions are: JPQL
JDO Doc
4

JDO Annotations

JDO defines dozens of annotations that can be divided into the following groups:
Manual
4

FROM clause (JPQL / Criteria API)

_TIMESTAMP,DELETE, DESC, DISTINCT, ELSE, EMPTY, END, ENTRY, ESCAPE, EXISTS, FALSE, FETCH,FROM, GROUP, HAVING
Manual
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JPA Persistence Unit

A JPA Persistence Unit is a logical grouping of user defined persistable classes (entity classes, embeddable classes and mapped superclasses) with related settings. Defining a persistence unit is optional when using ObjectDB, but required by JPA. persistence.xml Persistence units are defined in
Manual
4

DELETE Queries in JPA/JPQL

cannot include multiple variables and JOIN, and cannot include the GROUP BY, HAVING and ORDER BY clauses
Manual
4

JPA Criteria API Queries

, construct). FROM clause (from, join, fetch). WHERE clause (where). GROUP BY / HAVING clauses (groupBy