Contributed to the Baeldung/sql-tutorials repository by developing demonstration files focused on advanced SQL subqueries. The work centered on backend development and database design, using SQL to create practical examples that illustrate both standard and correlated subqueries. One example identified faculty members who taught the maximum number of courses in a semester, while another selected students enrolled in Mathematics department courses. These additions enhanced the instructional value of the repository, providing hands-on reference material for learners and instructors. No major bugs were addressed during this period, with efforts concentrated on expanding the depth and clarity of SQL learning resources.