>Data at the scale that the largest websites handle doesn’t work that way. Which accounts for a small minority of databases compared to the whole; ergo, why yo

>Data at the scale that the largest websites handle doesn’t work that way. Which accounts for a small minority of databases compared to the whole; ergo, why you find introductory SQL courses structured the way they are. "Performance" comes in many flavors. Reliability of data is on the top of a lot of company's priority list. It's not the end of the world, the end of someone's job, or the end of someone's service contract if a Facebook user doesn't get a message on time or at all.