About us
Open Query: MySQL and MariaDB consulting, remote DBA, training, and OQGRAPH — optimisation by design.
Open Query develops and delivers expertise for MySQL, MariaDB, and related infrastructure: architecture, remote DBA, training, mentoring, and the OQGRAPH engine.
Focus: optimisation by design, maintenance that prevents failure modes, scalability, and performance. Emergencies are expensive; the work is to make them rare and recoverable.
Founded by Arjen Lentz (formerly MySQL AB). The practice is vendor-neutral and engineering-led — fixed-scope mentoring and published service paths rather than open-ended mystery retainers.
- OQGRAPH — hierarchies and shortest paths in SQL
- Mentoring — fixed monthly fee
- Engineering blog
- Contact — learn@openquery.com