"War is peace. Freedom is slavery. Ignorance is strength."

If you keep learning all the time you have a huge advantage.

书籍是灵魂的镜子。

The database is the most important piece of software in the enterprise, and the most important piece of software in the enterprise is the database. The database is the foundation of all applications. The database is the heart of the application, and the application is the heart of the business. The key to performance is to keep the hot data in memory.