relational algebra

常見例句

The lookup is an example of the Rails 3 relational algebra.
查詢是 Rails 3 關(guān)系代數(shù)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(guān)于此話題的很好的介紹，解釋了ActiveRecord 3 中的“關(guān)系代數(shù)”背后的的動機(jī)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效的等價操作來代替關(guān)系代數(shù)操作同時不影響結(jié)果。