relational algebra

常见例句

The lookup is an example of the Rails 3 relational algebra.
查詢是 Rails 3 關系代數的一個示例。
is also a great introduction to this topic and shows the motivation and theory behind the "relational algebra" in ActiveRecord 3.
也是一個關於此話題的很好的介紹，解釋了ActiveRecord 3 中的“關系代數”背後的的動機和理論。
This theoretical model allows, for example, that relational algebra operations to be replaced by more efficient equivalent operations whereas not interfere with the result.
例如，這種理論模型允許用更有傚的等價操作來代替關系代數操作同時不影響結果。