一道面试题引发的 “大案”
昨天一个学生去一个金融公司面试，面试官问了一个 SQL join 问题：Suppose we have 2 tables, they both have some duplicates on the ID variable ( the linking key). If we full join…
Category: Blog
Compare Stock Prices within 9 Rows Python Code
Investing stocks is a good way to protect your money from inflation and taxes. But it is also very risky. Wisely picking your portfolio is…
Celebrate Christmas as a data scientist: Use SAS to play Jingle Bells
Jingle Bells, Jingle Bells, Jingle all the way…… 2020 is an unprecedented year full of challenges, struggles and strives for every one. Now it is…
【水煮面试】 3. 今日朝君面，咱们说点嘛？
Tell me a little bit about yourself.
相信大多数人都面试时都遇到过这个问题，而且据统计，> 80% 的面试都以此问题作…
【水煮面试】 1. 妾郎两有意，面试它是啥?
按照你自己的理解，你以为面试是什么？
我以为，面试---interview, 从某种更深的意义上来说：
It is a show for you to …
A Brief Summary of Advantages and Drawbacks of Python
Python is the most popular programming language nowadays. Based on my own experience, here is a list of advantages and limitations/drawbacks of Python…
Looping and Macro in SAS and Python
Macro or looping is an advanced programming in SAS, R and Python, it is necessary and very useful in real work, but it is quite hard and requires a ve…
【BigData Key Skills】： Part 3. Add New Columns and Conditional Processing
In previous two sections, we talked about how to sort, dedup and subset data. In this section, we are going to discuss on another important…