To query a user's mobile phone and WeChat number, the following SQL statement can be used.

What if the tools you already use could do more than you ever imagined? Picture this: you’re working on a massive dataset in Excel, trying to make sense of endless rows and columns. It’s slow, ...

A behind-the-scenes blog about research methods at Pew Research Center. For our latest findings, visit pewresearch.org. Identifying causal relationships from observational data is not easy. Still, ...

Python is one of the easiest programming languages to get to grips with, and also one of the most powerful and in-demand. Learning Python is not only fun then, but also a fantastic career move. One of ...