Hibernate Introduction

Hibernate Introduction

Hibernate refers to a higher performance object and a superior query service that is freely accessible and licensed under the GNU Lesser General Public License (LGPL).

Gavin King and colleagues at Cirrus Technologies founded Hibernate in 2001 as a replacement for EJB2-style entity beans. The primary aim and intention were to provide a much stronger persistence capability than EJB2 by simplifying all the available complexities and filling in the missing aspects.

The Hibernate development team began releasing Hibernate2 updates in early 2003, which included numerous substantial improvements over the original release. Furthermore, various editions and advancements entered Hibernate, and the latest versions came up with the latest advances.
Hibernate handles the mapping of Java classes to the available database tables (and Java data types to SQL data types). It also allows you to perform any query and retrieve data.

Hibernate Query Language (HQL) 

Hibernate provides the Hibernate Query Language (HQL) as a SQL-inspired language for writing SQL-like queries on Hibernate's data objects. As an object-oriented alternative to HQL, Criteria Queries are given, and criteria and the query is used to change the items and provide restrictions on them. The object-oriented equivalent of SQL is HQL (Hibernate Query Language). It generates database-agnostic queries, eliminating the requirement for database-specific queries. Without this functionality, altering the database would necessitate changing individual SQL queries, causing maintenance concerns.