A.select id,max(score)from student group by id B.select distinctidfromstudent C.select id from student D.select id from student where id is not null
A.round B.max C.abs D.now
A.客戶行為分析中決策數(shù)據(jù)化均需謹(jǐn)慎 B.數(shù)據(jù)挖掘分析中勢必強調(diào)模型的精確性,模型都不精確談何決策支持 C.數(shù)據(jù)分析師需要具備建構(gòu)模型和數(shù)據(jù)展示的能力 D.業(yè)務(wù)問題的洞察與模型的理解同樣重要