Tell us about your experience with transactions and their management in databases

In my experience working with Java and databases, I often used transactions to ensure data integrity. A transaction is a set of operations that are executed as a single unit: either all operations succeed, or in case of an error, a rollback to the original state occurs.

In Java, transaction management is often handled by:

• JDBC with manual commit and rollback control.
• Frameworks, such as Spring, where the @Transactional annotation can be used for automatic transaction management.

Example using Spring:

@Service
public class UserService {

    @Autowired
    private UserRepository userRepository;

    @Transactional
    public void createUserAndAccount(User user, Account account) {
        userRepository.save(user);
        // if an exception occurs here, both operations will be rolled back
        accountRepository.save(account);
    }
}

This approach guarantees that data will not end up in an inconsistent state, for example, if the user creation succeeded but the account creation did not.