In the fourteenth part of our Spring Boot JDBC Phonebook Project series, we focus on performing select operations using the query(final String sql, final ResultSetExtractor rse) method with JdbcTemplate. Learn how to use ResultSetExtractor to handle custom extraction logic for more complex queries. Follow along to master this powerful technique in your Spring Boot applications. Don't forget to like, comment, and subscribe to TechDeveloper for more in-depth programming tutorials and project insights!