Java Persistence API (JPA) Lecture Notes

These flashcards cover key concepts and definitions related to Java Persistence API (JPA) and Java Persistence Query Language (JPQL) discussed in the lecture.

JPQL

Java Persistence Query Language, a query language defined in JPA specification for creating queries against entities in a relational database.

EntityManagerFactory

A factory class for creating and managing multiple EntityManager instances to handle persistence operations.

TypedQuery

A type-safe query that indicates the expected result type, making code more reliable and easier to test.

NamedQuery

A predefined query with an unchangeable query string that allows passing query parameters without embedding literals.

NativeQuery

A JPA query written in plain SQL syntax that directly interacts with relational database tables.

Criteria API Query

A programmatically constructed query that allows for dynamic query creation using various methods.

EntityTransaction

An interface that manages transaction operations for entities, maintaining one-to-one relationship with EntityManager.

Entity

A persistence object that is stored as a record in a database.

Aggregate Function

A function that performs a calculation on a set of values and returns a single value, like MAX or AVG.

Scalar Function

A function that returns a single value based on input, such as UPPER to convert a string to uppercase.