In this chapter, we got a clear idea of the Spring JDBC module and learned how Spring JDBC helps to remove the boilerplate code that we use in core JDBC. We also learned how to design our database for optimal performance. We saw the various benefits of transaction management in Spring. We learned about various configuration techniques, such as isolation level, fetch size, and connection pooling, which improves the performance of our application. At the end, we looked at the best practices for database interaction, which can help us to improve our application's performance.

In the next chapter, we will see database interaction using ORM frameworks (such as Hibernate), and we will learn about Hibernate configurations in Spring, common Hibernate traps, and Hibernate performance tuning.