Hibernate Select Query

This tutorial contain the explanation of Select clause.


 

Ads

Tutorials   
Hibernate Examples Hibernate 5 build SessionFactory Example Hibernate 5 SessionFactory Example Hibernate 5 Annotation Example How to download Hibernate 5.x? Hibernate 5 Features Hibernate 5 Tutorials Learning Hibernate ORM - Free Training/Tutorial videos of Hibernate ORM with Java How to write hello world example program in Hibernate? How to create one to one relationship in Hibernate 4 with Annotation? How to calculate minimum in Hibernate using the min() Function Hibernate ORM 4.2.21.Final Released - Create CURD application in latest Hibernate Hibernate ORM 4.2.21 Tutorial - Learn Hibernate ORM Framework Hibernate Error: Failed to create sessionFactory object.java.lang.NoClassDefFoundError How to create Hibernate Project in Eclipse? Examples of Hibernate Criteria Query Hibernate ORM 4.3.6.Final released Hibernate ORM 4.2.14.Final released Hibernate 4.3.4 Released: Hibernate 4.3.4.Final Maven dependency Hibernate association and join example Learn Hibernate programming with Examples Introduction to Hibernate Framework Hibernate Tutorial: Learn Hibernate with examples Hibernate 4.3 Hello World: Example Hibernate ORM 4.3.1.Final released How to create SessionFactory in Hibernate 4.3.1? Hibernate 4 Hello World: Example of Hello World program Hibernate 4 create Session Factory: Example of creating Session Factory in Hibernate 4 Hibernate 4.3 and JPA 2.1 Example What is Hibernate in Java? Hibernate Overview and Architecture What is JPA 2.1? Hibernate 4.3.0.Final Maven dependency Hibernate 4.3 ORM Features Hibernate 4.3 Tutorial Hibernate Criteria average example Hibernate Criteria load all objects from table Hibernate Criteria Hibernate ORM 4.3.0.Final released Hibernate beginner tutorial Hibernate Session.delete() Example Hibernate save or update method example Hibernate Load Example Hibernate save Example - Rose India Hibernate 4 tutorials Hibernate Example Step by Step in Eclipse Hibernate Configuration files Setup Hibernate Environment Hibernate Architecture Hibernate Overview Hibernate 4.2 Tutorial
Ads

Hibernate Select Query

This tutorial contain the explanation of Select clause.

Hibernate Select Clause :

The work of  Select clause is to select whole database record or select the desired record under any condition .It  gathers objects and properties then returns it in a query set.

In hibernate you can use native query or HQL to select records by using SELECT clause. For specific record selection use where clause.

Here we are taking example of employee. So for selecting records of employee table we write query as -

SELECT emp.name, emp.salary, emp.dateOfJoin from Employee emp

This is your select clause, picking the employee details as employee name, salary and date of join from Employee table.

package net.roseindia.main;

import java.util.*;
import net.roseindia.table.Employee;
import net.roseindia.util.HibernateUtil;
import org.hibernate.Criteria;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.criterion.Restrictions;

public class MainClass {
public static void main(String[] args) {
SessionFactory sessionFactory = HibernateUtil.getSessionFactory();
Session session = sessionFactory.openSession();

String hql="SELECT emp.name, emp.salary, emp.dateOfJoin from Employee emp";
Query query=session.createQuery(hql);
query.setResultTransformer(Criteria.ALIAS_TO_ENTITY_MAP);

List objectList = query.list();
Iterator iterator = objectList.iterator();
System.out.println("Employee Name \t Salary \t Date of Join");
while(iterator.hasNext()){ 
Map map = (Map)iterator.next();
System.out.print(map.get("0"));
System.out.print("\t\t"+map.get("1"));
System.out.print("\t\t"+map.get("2"));
System.out.println();
}
session.close();
}
}

Output:

Hibernate: select employee0_.name as col_0_0_, employee0_.salary as col_1_0_, employee0_.date_of_join as col_2_0_ from employee employee0_
Employee Name  Salary  Date of Join
Mandy          20000   2010-03-12 00:00:00.0
Som            20000   1999-06-22 00:00:00.0
Mandy          15000   2003-12-23 00:00:00.0
Roxi           220000  2001-02-03 00:00:00.0
Rowdy          20000   2012-06-27 00:00:00.0

Download complete source code

Advertisements

Ads
Share on Google+Share on Google+

Hibernate Select Query

Posted on: July 2, 2012 If you enjoyed this post then why not add us on Google+? Add us to your Circles

Advertisements

Ads
 

Discuss: Hibernate Select Query  

Post your Comment


Your Name (*) :
Your Email :
Subject (*):
Your Comment (*):
  Reload Image
 
 
Comments:0

Ads

 

Ads