Using JPQL

JPQL stands for Java Persistence Query Language. It is a platform-independent query language that is used to query and manipulate data stored in relational databases using the Java Persistence API (JPA).

JPQL is similar in syntax to SQL, but it operates at the object level, allowing developers to write queries in terms of Java objects and their relationships rather than database tables and columns. This makes JPQL a more natural choice for developers working with Java-based applications and object-relational mapping frameworks like Hibernate.

Some key features and concepts of JPQL include:

• Entity Classes: JPQL queries are written against Java entity classes, which are Java objects that represent database tables.
• Object-Oriented Queries: JPQL allows you to query and manipulate data in an object-oriented way, using the names of Java classes and their attributes.
• Relationships: JPQL supports querying data based on the relationships between entities, such...