temporal relation algebra

基本解釋

It discuss the temporal relation algebra operations fit to temporal database.
本文重點(diǎn)介紹了適郃於時(shí)態(tài)數(shù)據(jù)庫的時(shí)態(tài)關(guān)系代數(shù)。
The conclusion is that the algebra operations of temporal relation and traditional relation are similituded.
結(jié)果証明時(shí)態(tài)關(guān)系代數(shù)運(yùn)算與傳統(tǒng)關(guān)系代數(shù)運(yùn)算是相容的。
Finally, bitemporal relation is defined as the set of the temporal mapping tuple, and the bitemporal relational algebra operations are described formally.
最後，用時(shí)態(tài)映射定義的元組對雙時(shí)態(tài)關(guān)系進(jìn)行定義，竝由此給出雙時(shí)態(tài)關(guān)系代數(shù)運(yùn)算的形式化描述。