理学 数据库系统 释 relational algebra 关系代数 一种抽象的关系数据语言，它通过对关系的运算来表达查询。
relational algebra 关系代数
数据库 数据库理论 释文 relational algebra 关系代数
- tensor renormalization group
- tensor representation
- tensor sheet
- tensor space
- tensor structure
- tensor subspace
- tensor sum
- tensor susceptibility
- tensor symmetric in time
- tensor to scalar ratio
- tensor-to-scalar ratio
- tensor trace
- tensor transpose
- tensor treatment
- tensor virial theorem
- tensor volume
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- tens place
- tens rule
- ten-symbol
- TEN-T
- TeNT
- tent
- tentacle
- tentacle girdle