JPQL
i searched for native query and this is the best site that give me enough informations about it. by the way please insert some examples with parameters 

JPA Native Queries, JPA Native Queries Tutorials
JPA Native Queries       In this section, you will know about the jpa native queries and how to use native query in your JPA application.  JPA Native Queries: JPA native 

JPA Examples
queries in JPA.   JPA Native Queries : Here you will find the examples which will demonstrate you how to execute Native queries in JPA.   JPA... query methods example, example for executing queries, JPQL aggregate functions 

JPA Examples In Eclipse
Native Queries In this section, you will know about the jpa native queries...;  JPA Aggregates In JPQL (Java Persistence Query Language) queries... have provided examples of EJB QL, JPA Native Query, JPA Named query, JPA 

JPA Sub-Queries
JPA Sub-Queries       In this section, you will see how to use sub-queries in your JPA... components in a single query. JPA Sub-queries:  Query query 

JPA Named Queries
JPA Named Queries       In this section, you will know about the JPA Named Queries...;) }) For developing JPA Named Queries, you need the following files 

JPA Ordering
JPA Ordering       In this section, you will learn about the JPA Ordering and how to develop JPA application using ordering. JPQL queries can contains ORDER BY clause 

JPA-QL Queries
JPA-QL Queries       In this section, we will use the simple JPA-QL query in our JPA application. Here JPA-QL query used with createQuery() method of EntityManager 

Need Jar in the JPA examples
/jpa/eclipsejpaexamples/index.shtml Thanks...Need Jar in the JPA examples  JPA - tutorial is good, very easy.... and how Hibernates are used in the JPA example? Thnaks Abhijit Das    

JPA Tutorial
JPA Tutorial In this section we will discuss about the Java Persistence API. This section will describe you all the aspects of JPA such as what is JPA, architecture of JPA, features of JPA, JPA entities, entity inheritance JPA, how 

JPA Named Query
JPA Named Query       In this section, you will read about the JPA Query, its types and how to use the JPA Named Query in your JPA application. JPA Query is powerful