My database travel, started 39 years ago, with dBASE III from Nantucket (I was 16yo). Since, I've worked, program, design,setup, secure and optimize hundreds of servers, thousands of databases, tables, queries, stored procedures, functions, views, triggers, etc. using different technology such as Sybase, Oracle, MS SQLServer, PostgreSQL, mariaDB, Groonga, MySQL, Columnstore, spark, Kafka, Hadoop, MongoDB, etc.