2 | Running JPA Queries of a single object is easy and the code is simple: Query query = em.createQuery("SELECT COUNT(c) FROM |
2 | Paths and Types in JPQL and Criteria API expressions in the above code can be divided into two main groups: FROM variable expressions, represented by |
2 | Locking in JPA a PESSIMISTIC_READ lock on that database object. For example, consider the following code fragment: em1 |
2 | Database Explorer that include user defined methods can be supported by the Explorer only when the code of these methods |
0 | Step 2: Define a JPA Entity Class code: package guest; import java.io.Serializable; import java.sql.Date; import javax.persistence |
0 | Step 3: Define an EJB Session Bean code: package guest; import java.util.List; import javax.ejb.Stateless; import javax |
0 | Step 4: Add a Servlet Class servlet class. Now replace the content of the new source file with the following code: package guest |
0 | Getting Started with JPA and NetBeans might look slightly different but the code would be the same). This tutorial consists of the following steps: |
0 | Step 4: Add a Servlet Class of the new source file with the following code: package guest; import java.io.IOException; import |
0 | Which API should I use - JPA or JDO? code. When to prefer JDO JDO might be preferred when portability to other object databases |
