Over 15 years of experience in Oracle & MySQL operations and maintenance.Participated in numerous large - scale database delivery projects for clients such as mobile carriers, telecom operators, banks, securities firms, government agencies, transportation entities, and social security organizations, demonstrating extensive experience in operations and management.Possess an in - depth understanding of the management, operation mechanisms, locking mechanisms, and optimization mechanisms of Oracle & MySQL databases.Specialize in performance tuning, troubleshooting, and recovery of Oracle & MySQL databases. In the past 15 years, the total amount of Oracle databases recovered has exceeded 1PB.