Over two months, Yesms01 developed four SQL-driven features for the Hyubbbb/FLY_PCSQL repository, focusing on data extraction and analytics workflows. They engineered hierarchical data exploration for ECOLI_DATA using complex self-joins to map parent-child relationships and extract multi-level IDs, and created queries to identify top restaurants by food type through subqueries and aggregation. In subsequent work, Yesms01 enhanced animal intake data retrieval with null-safe handling and standardized formatting, and built a categorized economy books catalog with precise ordering. Their work demonstrated strong skills in SQL, database management, and data quality, delivering reusable artifacts that improved analytics reliability and downstream consumption.