理学 数据库系统 释 query optimization 查询优化 查询优化旨在通过选择有效策略，对给定的关系表达式求值，使得查询代价最小。
数据库 数据库管理系统及其实现技术 释文 query optimization 查询优化
- harmonically conjugate points
- harmonic analysis
- harmonic analysis of tide
- harmonic analysis of tides
- harmonic analysis spectrum estimation
- harmonic analyzer
- harmonic approximation
- harmonic average
- Harmonic Average Method for Determining the Effective Diffusion Coefficient of Interface
- harmonic balance
- harmonic balance method
- harmonic Beltrami coefficient
- harmonic boundary
- harmonic brick
- harmonic cadence
- harmonic capacity
- harmonic complex
- harmonic component
- harmonic condition
- harmonic congruence of normals
- harmonic conjugate
- harmonic conjugate function
- harmonic conjugate lines
- harmonic conjugate planes
- harmonic conjugate points