理学 数据库系统设计 释 functional dependency 函数依赖 数据库中一个关系中两组属性之间的约束。
数据库 数据库理论 释文 functional dependence, FD 函数依赖
- pulse system
- pulse technique
- pulse terahertz emitter
- pulse terahertz source based on super fast optoelectronic technology
- pulse-to-pulse correlation
- pulse train
- pulse transfer function
- pulse transition duration measurement technology
- pulse transmission
- pulse transmission mode
- pulse tube cooling
- pulse tube refrigerator
- pulse turbocharging
- pulse turbocharging system
- pulse type electronic fence
- pulse vector network analyzer
- pulse voltammetry
- pulse walk
- pulse wave
- pulse waveform parameter metrology
- pulse width
- pulse width modulation
- pulse-width modulation
- pulse window
- pulse with root