Master Hibernate and JPA with Spring Boot in 100 Steps - Step 50 - JPQL - Courses Without Students

The video tutorial introduces JPQL, focusing on its use in writing queries with defined relationships. It covers setting up a demo application, writing simple queries to find courses without students, and using JPA to simplify complex queries. The tutorial emphasizes the ease of using JPQL with entity relationships, avoiding complex SQL queries. The session concludes with a summary and hints at future query writing.

What is JPQL primarily used for in Java Persistence?

• To handle exceptions in Java applications

• To design user interfaces

• To create and execute queries on entities

• To manage database connections

What is the purpose of commenting out parts of the demo application?

• To delete unnecessary code

• To change the database schema

• To prepare for writing new JPQL queries

• To improve application performance

Which file contains the data used for unit tests in the demo application?

• demo_data.csv

• unit_test_data.xml

• test_data.json

• data.sql

What is the main difference between the SQL and JPQL approach to finding courses without students?

• SQL is more secure than JPQL

• JPQL uses entity relationships while SQL uses table joins

• SQL is faster than JPQL

• JPQL requires more code than SQL

How does JPQL simplify querying compared to traditional SQL?

• By using direct table names

• By focusing on entities and their relationships

• By eliminating the need for a database

• By using a different programming language

What is the result of the JPQL query to find courses without students?

• Courses with no students

• Courses with the most students

• All courses

• Courses with at least one student

Why is JPQL preferred over JDBC for complex queries?

• JPQL requires less setup than JDBC

• JPQL is more readable and uses entity relationships

• JPQL is a newer technology

• JPQL is faster than JDBC