I’m a database expert, instructor and technical blogger.

I have more than 18 years of IT experience, including 13 in Oracle Support and 10 in Oracle Software Development and specialized in Oracle Database Performance Tuning (SQL and DB Tuning) and in the development of Oracle DB IT architectures (highly available, low-maintenance, cost efficient storage of data). During my time at 18 years experience in database, including Oracle8i, 9i, 10g, 11g, 12C, 19C installation, backup, recovery, high availability (ADG RAC) and tuning. Mastering the knowledge of Oracle's architecture, including memory structure, physical storage, SQL Tuning and more.MySQL 5.6, 5.7, 8.0. Mastering the knowledge of the architecture of MySQL, including memory structure, physical storage, SQL Tuning and more. Familiar with using MySQL multisource replication, filtering replication.