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
- geometric precision
- geometric primitive parameter
- geometric probability
- geometric probability model
- geometric problem
- geometric problems of antiquity
- geometric process
- geometric programming
- geometric programming (GP)
- geometric progression
- geometric progression selection model
- geometric property
- geometric proportion
- geometric quantity
- geometric quantity measurement
- geometric quantization
- geometric quantum computation
- geometric query
- geometric quotient
- geometric realization
- geometric realization of U_q(g)
- geometric realization of Uq(g)
- geometric registration of imagery
- geometric relation
- geometric representation