SQL is short for Structured Query Language. From its words you can tell, it is a tool to query something from somewhere. It is a declarative language but not procedural language. It means that you just use it to tell what you want to get from somewhere rather than tell how to your results areContinue reading “Database and SQL – 1”
Author Archives: Eddy Zhang
Plan at the end of 2020
Yeah! I launched my personal blog a while ago, however, I’ve never written anything since then. I don’t want to waste more time on some meaningless things, so I decided to start my blog. I will try to keep one post every two weeks covering financial markets, data science or portfolio analytics. So, have funContinue reading “Plan at the end of 2020”
Eddy Zhang 