Disclaimer: I do not build database engines. I build web applications. I run 4-6 different projects every year, so I build a lot of web applications. I see apps with different requirements and different data storage needs. I’ve deployed most of the data stores you’ve heard about, and a few that you probably haven’t. I’ve picked the wrong one a few times. This is a story about one of those times —
![Why You Should Never Use MongoDB](https://cdn-ak-scissors.b.st-hatena.com/image/square/aa76869f4aa7fb4708232344c1b5e3535e5e33cf/height=288;version=1;width=512/http%3A%2F%2Fwww.sarahmei.com%2Fblog%2Fwp-content%2Fuploads%2F2013%2F11%2FScreen-Shot-2013-11-09-at-10.31.52-PM.png)