問(wèn)答題
【簡(jiǎn)答題】什么是關(guān)于數(shù)據(jù)倉(cāng)庫(kù)映射的元數(shù)據(jù)?
答案:
這類元數(shù)據(jù)是數(shù)據(jù)源與數(shù)據(jù)倉(cāng)庫(kù)數(shù)據(jù)之間的映射。反映數(shù)據(jù)倉(cāng)庫(kù)中的數(shù)據(jù)項(xiàng)是從哪個(gè)特定的數(shù)據(jù)源抽取的,經(jīng)過(guò)了哪些轉(zhuǎn)換、變換和裝載...