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- relational algebra language 关系代数语言
- In relational databases, an operator in relational algebra. 在关系数据库中，关系代数用的一种运算符。
- In relational algebra, the problems I discussed in this article are called relational division. 在关系代数中,我在本文中讨论的问题称为关系划分。
- From the perspective of relational algebra,decomposes any query to the sub-query on data partitioned horizontally and the post-query on merged intermediate results. 从关系代数的角度,将任意查询分解成对水平数据分区的子查询和汇总中间结果的后处理查询。
- According to the Von Neumann equation and by means of the computer algebra language, the authors compute and research the evolution of AMX system under RF irradiation. Finally, some valuable conclusions are given. 根据 Von- Neumann方程 ,借助于计算机代数语言 ,计算出在射频场照射下 AMX体系的状态变化规律 ,并对其进行了初步研究 ,获得了一些结论
- Relational Algebra and Relational Calculus 关系代数与关系演算
- Temporal Extension of Relational Algebra Operators 关系代数操作符的时态扩展
- This paper introduces the concept of generalized fuzzy relation and extends relational algebra operators such as union, intersection, difference, Cartesian product, selection, projection etc. 文中引入了广义模糊关系的概念，讨论了广义模糊关系代数的操作：广义模糊并、广义模糊交、广义模糊差、广义模糊笛卡尔积、广义模糊投影和广义模糊选择等。
- Language teaching is both a science and art. 语文教学既是一门科学又是一种艺术。
- ER() also gives a set of integrity rules.ER() expends relation model and relation algebra and uses object oriented and relation model to present multidimensional data. ER()给出了一组完整性规则.;扩充了关系模型和关系代数;使得能用关系对象模型表示多维数据
- original relational algebra operators 原始算子
- derived relational algebra operators 关系代数的派生算子
- Logical operators describe the relational algebraic operation used to process a statement. 逻辑运算符描述了用于处理语句的关系代数操作。
- Daily practice is the trick in learning a foreign language. 每天练习是学会一门外语的诀窍。
- One can not learn a language well unless one works hard. 学好一种语言非下苦功不可。
- The English language is allied to the German language. 英语和德语属于同一语系。
- The boy can't figure out the algebra problems. 这个男孩做不出这道代数题。
- We've learned algebra in middle school. 我在中学就学过代数学。
- She was studying to build up her algebra. 她在学习以提高自己的代数水平。
- Our language goes current along the seacoast. 我们的语言通用于沿海一带。
