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About Group Id

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JDO Doc
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removeFetchGroups(groups)

Method javax.jdo.PersistenceManagerFactory void removeFetchGroups(   FetchGroup... groups ) Remove the FetchGroups from the set of active FetchGroups. Existing FetchGroups that match parameter ... . Parameters: groups - an array of FetchGroups Throws: SecurityException - if the caller is not
JPA Doc
20

javax.persistence.Id

javax.persistence Annotation Id Target: Fields (including property get methods) Specifies the primary key of an entity. The field or property to which the Id annotation is applied ... : @Id public Long getId() { return id; } Since: JPA 1.0 See Also: Column GeneratedValue Learn
Manual
19

Chapter 4 - JPA Queries (JPQL / Criteria)

(and a criteria query) is explained by describing the main clauses of JPQL queries (SELECT, FROM, WHERE, GROUP
JDO Doc
19

Constants.PMF_ATTRIBUTE_SERVER_TIME_ZONE_ID

Static Field javax.jdo.Constants String PMF_ATTRIBUTE_SERVER_TIME_ZONE_ID The name of the persistence manager factory element's "server-time-zone-id" attribute. Since: JDO 2.1
JDO Doc
19

Constants.PROPERTY_SERVER_TIME_ZONE_ID

Static Field javax.jdo.Constants String PROPERTY_SERVER_TIME_ZONE_ID Mapping "javax.jdo.option.ServerTimeZoneID" Since: JDO 2.1
Tutorial
18

Getting Started with JPA and Eclipse

. 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
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Step 2: Entity Class and Persistence Unit

.GeneratedValue; 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
Tutorial
18

Step 2: Entity Class and Persistence Unit

.persistence.Id; @Entity public class Guest implements Serializable { private static final long serialVersionUID = 1L; // Persistent Fields: @Id @GeneratedValue Long id
Tutorial
16

Getting Started with JPA and NetBeans

. For this tutorial, besides the Java JDK (5 or above) and the NetBeans IDE (any bundle that includes Java
Forum
16

Group by date / time

something like this: SELECT COUNT(id) FROM stats WHERE YEAR(record_date) = 2009 GROUP BY DATE ... Hi, I'm trying to create reporting query that will return entities grouped by year / mont / day ... DAY() in ODB. So, how to build queries similar to something like this: SELECT COUNT(id) FROM