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
- probability paper
- probability planning
- probability potential theory
- probability-probability plot
- probability process
- probability programming language
- probability proportional to size sampling
- probability ratio
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- probability sampling
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- Probability Statistics of Unearthed Plant Remains
- probability structure
- probability table
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- probability-theoretic
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- probability vector
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- probability wave collapse
- probabilized vector space