Master Hibernate and JPA with Spring Boot in 100 Steps - Step 15 - JPQL-Basics

The video tutorial introduces SQL and JPQL, highlighting their differences. It explains how SQL queries are written and executed, focusing on the 'select' and 'where' clauses. The tutorial then transitions to JPQL, a query language for Java Persistence API, which queries entities instead of tables. It covers writing and executing JPQL queries, emphasizing the use of typed queries for type safety. The tutorial concludes with advanced JPQL queries, including using 'where' conditions and entity relationships.

What is the purpose of a WHERE condition in a SQL query?

• To group the results

• To specify the columns to be selected

• To filter records based on a condition

• To sort the results

How does JPQL differ from SQL?

• JPQL is a programming language, SQL is not

• JPQL queries from entities, SQL queries from tables

• JPQL is used for database management, SQL is not

• JPQL queries from tables, SQL queries from entities

What is the role of the EntityManager in JPQL?

• To manage database connections

• To handle user authentication

• To execute JPQL queries

• To create SQL tables

What does the JPQL query 'SELECT C FROM Course C' do?

• Selects all entities of type Course

• Selects all columns from the Course table

• Selects a specific column from the Course table

• Selects a specific entity from the Course table

What is a typed query in JPQL?

• A query that returns a specific type of result

• A query that is written in a specific programming language

• A query that is executed in a specific environment

• A query that is used for database updates

Which of the following is a benefit of using typed queries?

• They are faster to execute

• They are compatible with all databases

• They make the code easier to read and understand

• They require less memory

In JPQL, what does the 'LIKE' keyword do?

• It sorts the results

• It filters results based on a pattern

• It joins two tables

• It groups the results