理学 数据库系统 释 relational calculus 关系演算 一种抽象的关系数据语言，它通过数理逻辑中的谓词演算表达查询的要求。
数据库 数据库理论 释文 relational calculus 关系演算
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- Mises
- Mises stress
- MISFET
- misfire removal
- misfit
- misfit dislocation
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- misfocusing
- misfocusing optical profiler
- misfolding
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- misidentification
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- mismatch
- mismatch amplification mutation assay
- mismatch negativity