A.數(shù)據(jù)庫(kù)是記錄數(shù)據(jù)的流水賬,數(shù)據(jù)倉(cāng)庫(kù)需要對(duì)數(shù)據(jù)庫(kù)中的數(shù)據(jù)進(jìn)行抽取、清洗、轉(zhuǎn)換等
B.數(shù)據(jù)倉(cāng)庫(kù)源數(shù)據(jù)在原數(shù)據(jù)庫(kù)中有可能有重復(fù)或不一致之處,必須將這些數(shù)據(jù)轉(zhuǎn)換成全局統(tǒng)—的定義
C.數(shù)據(jù)提取的周期決定了動(dòng)畫(huà)間隔的時(shí)間,數(shù)據(jù)提取的周期越短,則動(dòng)畫(huà)的速度越慢
D.數(shù)據(jù)倉(cāng)庫(kù)的數(shù)據(jù)主要供企業(yè)領(lǐng)導(dǎo)者決策分析之用,所涉及的數(shù)據(jù)操作主要是數(shù)據(jù)查詢、分析和修改