About SELECT

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Forum
17

Performance in SELECT statement

has around 30.000 rows) Example query looks like : String strSelect = "SELECT e FROM TestEntity
Forum
16

Class fields selection to store

Class fields selection to store
Forum
16

Selective merge/cascade of detatched entity

Selective merge/cascade of detatched entity
Manual
16

Shared (L2) Entity Cache

: NONE - cache is disabled. ENABLE_SELECTIVE - cache is disabled except for selected entity classes (see below). DISABLE_SELECTIVE - cache is enabled except for selected entity classes ... Cache Settings The ENABLE_SELECTIVE mode indicates that the cache is disabled for all the entity
Manual
16

BIRT/ODA ObjectDB Driver

extension. To install it: Open the [Install] dialog box by selecting Help > Install New Software... In ... ENTER. Select the ObjectDB Birt/ODA feature. Complete the installation by clicking Next twice, accepting ... and selecting New Data Source. Select ObjectDB Data Source from the list of available data source types
Manual
16

JPA Named Queries

="SELECT c FROM Country c") The @NamedQuery annotation contains four elements ... class. But since the scope of named queries is the entire persistence unit, names should be selected ... ", query="SELECT c FROM Country c") public class Country { ... } Attaching multiple named
Tutorial
16

Step 7: Run the Spring Web App

as a server in your NetBeans - you should be able to run your application now by selecting Run > Run Main Project from the main menu (or F6): You can select the server in the Run category of the project properties window (right click the project node and select Properties to open it). Alternatively
Manual
16

CRUD Database Operations with JPA [2011-02-11]

objects in the database by using a simple query: Query q1 = em.createQuery("SELECT COUNT(p) FROM Point p"); System.out.println("Total Points: " + q1.getSingleResult()); The query string ("SELECT ... of a query that returns a single result: Query q2 = em.createQuery("SELECT AVG(p.x) FROM Point p
Manual
16

CRUD Database Operations with JPA

objects in the database by using a simple query: Query q1 = em.createQuery("SELECT COUNT(p) FROM Point p"); System.out.println("Total Points: " + q1.getSingleResult()); The query string ("SELECT ... of a query that returns a single result: Query q2 = em.createQuery("SELECT AVG(p.x) FROM Point p
Manual
16

Running JPA Queries [2011-09-21]

The Query interface defines two methods for running SELECT queries: Query.getSingleResult - for use ... query = em.createQuery("SELECT c FROM Country c", Country.class); ListSELECT c FROM Country c"); List results = query