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
- correlation detector
- correlation determinant
- correlation diagram
- correlation diagram of energy level
- correlation dimension
- correlation energy
- correlation evaluation
- correlation exponent
- correlation flowmeter
- correlation fluctuation of pressure and entropy
- correlation fluctuation of pressure and volume
- correlation fluctuation of temperature and entropy
- correlation fluctuation of temperature and volume
- correlation function
- correlation functional
- correlation function method
- correlation function of clusters
- correlation function of fluctuation force
- correlation function of galaxies
- correlation function of halo
- correlation function of quasars
- correlation immunite function
- correlation immunity
- correlation index
- correlation inequality