Risman Kurniawan et al. 2026. Query Performance Optimization in MySQL Databases: An Experimental Analysis of Normalization and Indexing. Applied Engineering: Jurnal Rekayasa dan Sains Terapan. 1, 1 (Jun. 2026), 25–42. DOI:https://doi.org/10.67710/appliedengineering.v1i1.6.