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Manual
3

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
Tutorial
3

Step 1: Create a Web Project

file from the file system and dropping it on the WEB-INF/lib node in the Eclipse Project Explorer
Tutorial
3

Step 1: Create a Java Project

] window and select Add Jar/Folder... Select the objectdb.jar file from the bin subdirectory
Manual
3

BIRT/ODA ObjectDB Driver

and selecting New Data Source. Select ObjectDB Data Source from the list of available data source types
Tutorial
3

Step 5: Add a JSP Page

from the request's "guests" attribute that is set by the servlet in the previous step
Tutorial
3

Step 4: Add a Servlet Class

are retrieved from the database and stored in the request's "guest" attribute. Then the processing
Tutorial
3

Step 1: Create a Maven Web Project

and to automatically download the required JAR files from Maven repositories - open the pom.xml file
FAQ
3

What is the Java Persistence API (JPA)?

The Java Persistence API (JPA) is a standard API for accessing databases from within Java applications. The main advantage of JPA over JDBC (the older Java API for interacting with databases) is that in JPA data is represented by classes and objects rather than by tables and records as in JDBC
Tutorial
3

Step 5: Add a JSP Page

that have already signed (which are retrieved from the request's guestDao attribute that is set by the controller in
Result
3

What is new in ObjectDB 2.0?

ObjectDB 2.0 supports many new features and improvements, including: Most of the features of the new JPA 2.0 and JDO 2.2 APIs. User defined IDs (primary key) and sequences. Support of unlimited index keys size. SQL like queries ("select from ... where ..."). Real non blocking multithreading in