无论是MySQL、PostgreSQL，还是Snowflake、BigQuery，只要会写SELECT，你就能和数据对话。它稳定、高效、逻辑清晰，是每个数据从业者的基本功。 这些需求，用SQL不是做不到，而是 成本太高 ——每换一个视角，就要重写一段逻辑；每加一个条件，就要多一层嵌套。更别说，结果还得手动导出、美化、发邮件。

Learn how to master the SELECT statement to form truly useful data queries. This article explains functions, clauses, and keywords that will make your life a lot easier. Due to popular demand, we’re ...

We list the best SQL online courses, to make it simple and easy to learn how to mange, code, and run databases, covering everything from beginner to advanced users. The Structured Query Language or ...

CSDN桌面端登录 雷·库兹韦尔《奇点临近》 2005 年，库兹韦尔提出奇点理论。奇点理论的大概意思是，技术变革速度将会越来越快，到达某一点将会爆发，人类生活将不可避免地发生改变。奇点本质上是对科技趋势的理解，同时也是引起一个人重新思考每一件事的领悟，从健康和财富的意义到死亡和 ...

Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement. It’s sometimes difficult to know which SQL syntax to use when ...