Jianrong YangHi, I'm Jianrong Yang.
I make complex systems stable, and turn ideas into things people can use.
A database & operations engineer for 19 years — Oracle & MySQL at scale, migrations, performance and reliability. Author of two DBA handbooks. Now building small products with AI and writing about the craft. My main site is in Chinese; this page is the short English version.
What I do
Three threads that make up a complete picture of me.
Databases & Reliability
19 years hands-on with Oracle & MySQL — architecture, migration, performance tuning, and real incident post-mortems.
AI & Engineering
Not just watching the trend — building tools, running experiments, and shipping AI into real workflows.
Small Products
Turning long-term notes into things people can actually use: mini-apps, a knowledge base, web agents.
Books
Two handbooks from 19 years on the front line
Oracle DBA Working Notes (2016, reprinted 7×) and MySQL DBA Working Notes — from scattered field notes to reusable methodology. Widely sold across Chinese and international bookstores.
Things I've built
Side projects and experiments — most are usable across languages, feel free to try.
Let's connect
I'm always happy to meet people who care about databases, reliability, AI, and building things that last. Say hi.