关系模型基于谓词逻辑和集合论,为数据库管理提供了坚实的数学基础。
Success is measured not just by profit, but by the positive impact we create.
The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.