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Paths and Types in JPQL and Criteria API

through a NULL value The following query retrieves country names with their capital city names: SELECT

ObjectDB Object Database Features

activation (no activation depth) - objects are retrieved from the database automatically by navigating from

ObjectDB Overview

The ObjectDB Object Database ObjectDB is a powerful Object-Oriented Database Management System (ODBMS). It is compact, reliable, easy to use and extremely fast. ObjectDB provides all the standard database management services (storage and retrieval, transactions, lock management, query processing

Database Explorer

. This setting is relevant only in the Explorer. In your applications - retrieved String instances

Step 5: Add a JSP Page

the guestbook, followed by a list of all the guests that have already signed (which are retrieved from

Step 4: Add a Servlet Class

. All the Guest entity objects are retrieved from the database and stored in the request's "guest

Getting Started with JPA and NetBeans

This is the NetBeans version of the Quick Start with JPA tutorial. It demonstrates how to create and run a simple JPA application in NetBeans. The demonstrated application uses JPA to store and retrieve simple Point entity objects, where each Point has two persistent fields - x and y

Step 4: Create an ObjectDB Data Set

contains Point entity objects. We will use a simple JPQL query that retrieves points with x value in

[ODB1] Chapter 4 - JDO Metadata

. When a persistent object is retrieved from the database its fields are not ready yet. Only when the program

[ODB1] Chapter 1 - About ObjectDB

is Very Fast ObjectDB has very good performance. It can store and retrieve thousands of objects

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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