“relational algebra”造句，怎麼用relational algebra造句

Finally, bitemporal relation is defined as the set of the temporal mapping tuple, and the bitemporal relational algebra operations are described formally.

Similarly, based on the medium set theory MS, the medium relational algebra can extend the capability of relational algebra.

This theoretical model allows, for example, that relational algebra operations to be replaced by more efficient equivalent operations whereas not interfere with the result.