What is SQL and what kind of experience do you have using it?

"I began to self-teach myself SQL years ago and later followed that up by taking an online SQL course that provided hands-on training. Since then, I've used it countless times during my career. Mastering Excel was important to be able to manipulate data, but SQL is on a whole other level. I have used it to manage and store data, build databases, change database structures, and relate multiple databases to each other. I honestly don't know how I'd do my job without the knowledge I have about SQL, and I look forward to applying that experience and know-how to this position."