I started my technical career in 2004 working for a few small web shops as a PHP developer. In 2007 at started at a large global corporation as a PHP developer and when we realized that we needed a MySQL DBA, I assumed that role in 2009. In that same year, I took and passed the MySQL DBA certification exam and have been working as a MySQL DBA since that time. For the first couple of years, I didn't have any other DBA's to lean on and had to rapidly solve problems in production that I had never seen. Most of the books, lessons, tutorials that I used to learn MySQL taught what happens when everything goes right. Although certainly useful, it didn't always help when things went wrong and I needed to quickly solve these problems. That's why in my teaching approach, I like to show you what happens when things go wrong, how to recognize them as well as avoid/fix them.