# relational algebra中文

## 例句與用法

1. In relational databases , an operator in relational algebra
在關系數據庫中，關系代數用的一種運算符。
2. It is implied by the associative and commutative transformations permitted in relational algebra
它由關系代數中允許的關聯轉換和交換轉換表示。
3. Leap is an rdbms ( relational database management system ) implementing the relational algebra - a core part of relational database theory
Leap是一個rdbms ，它實現了關系代數，關系數據庫理論的一個核心部分。
4. A clause is formalized as a relational algebra expression and evaluated by employment of relational algebra operations . 3 . the proof theory based on xml is presented
提出了利用關系代數運算實現xml查詢子句求值的方法，并證明了該方法的正確性。
5. This course is designed to introduce graduate students to the foundations of database systems , focusing on basics such as the relational algebra and data model , query optimization , query processing , and transactions
課程描述本課程設計的目的是給研究生介紹數據庫的基礎知識，關注于基礎，如關系代數和數據模型，查詢優化、查詢處理和事務。

## 百科釋義

In computer science, relational algebra is an offshoot of first-order logic and of algebra of sets concerned with operations over finitary relations, usually made more convenient to work with by identifying the components of a tuple by a name (called attribute) rather than by a numeric column index, which is what is called a relation in database terminology.
詳細百科解釋