Using Spring Data JPA with PostgreSQL Views

In this story, we’ll explore using Spring Data JPA with PostgreSQL views in a Spring Boot application.

· Prerequisites
· Overview
∘ Understanding Database Views
∘ Key Benefits of Database Views
· Database Setup
· Let’s code
∘ Entity Class for the View
∘ Create a Spring Data repository
∘ Business service layer
∘ Create a REST API endpoint
· Test the REST APIs
· Conclusion
· References

Prerequisites

This is the list of all the prerequisites:

• Spring Boot 3+
• Maven 3.6.+
• Java 21 or later
• PostgreSQL
• Postman or Insomnia
• Your favorite IDE (IntelliJ IDEA, Eclipse, NetBeans, VS Code)

Overview

Understanding Database Views

Database views are a powerful feature in relational database management systems (RDBMS) that allow users to create virtual tables based on the result of a query. Views are widely used in relational databases like PostgreSQL, MySQL, Oracle, and SQL Server to simplify complex queries, enforce security, and provide a consistent interface to data.

Key Benefits of Database Views

The benefits of using Database views are listed below:

• A view is a virtual table that is defined by a SQL query. It does not store data but provides a way to access data from one or more tables.
• Views can simplify complex queries, making it easier for users to access data without needing to understand the underlying table structure.
• By restricting access to specific columns or rows, views can enhance data security.
• Views provide a level of abstraction, allowing changes to the underlying tables without affecting how users access the data.
• Applications can query…