A.建立數(shù)據(jù)庫(kù),整理和歸并各種形式的數(shù)據(jù) B.數(shù)據(jù)挖掘 C.在線數(shù)據(jù)分析 D.將數(shù)據(jù)轉(zhuǎn)化成信息