Yes, this method is updating the database.
Here is more explanation for the “SpringApplication”:
SpringApplication class is used to bootstrap and launch a Spring application from a Java main method. This class automatically creates the
ApplicationContext from the classpath, scan the configuration classes and launches the application. This class is very helpful in launching Spring MVC(https://www.journaldev.com/2433/spring-mvc-tutorial) or Spring REST application using Spring Boot.
A java class with main method, mark it with “@SpringBootApplication” annotation and invoke “SpringApplication.run()” method.
When we will then run the application, we will get the required output.
I hope everything will be clear now.
Feel free to ask if you have any question.