Pei Jianxin

It is very common that you want to add some unique key constraint in your database schema. Say for a online shopping system you have the following entity: public class CreditCard { private UUID id;     private long number; private long customerId; private String nickname; ...

Hello everyone, how are you doing? I'm sorry that I didn't introduce myself in my previous blog. I just forgot to do so, lol. I'm Lanbo, a newbie back-end software engineer at Tagbangers. And as a newbie who is not talented, I faced many problems on the road of programming.  By solving the problems ...

What is Amazon Web Services (AWS)? Well, AWS is the web services provided by Amazon. A pretty straight forward name, isn't it? Okay, okay. I know the "explanation" above does not really help, but I am trying to avoid answering "what is AWS" directly, on purpose. AWS includes various services and res...