Ods possesses some characteristics of some characteristics and oltp systems of the data warehouse , it is the data " who faces the theme , integrates , or close to present , constantly changeably at present " because dss is peculiar : ca n ' t fully understand the demand ; the demand change is great ; implement time long cycle , but the customer demands to become effective and wait for the characteristic soon at the time of making bi systematic scheme of the enterprise layer , should consider on the issue that there is a great deal of , in a situation that the fish and bear ' s paw must hold concurrently , make the choice Ods ( operationaldatastore )是數(shù)據(jù)倉(cāng)庫體系結(jié)構(gòu)中的一個(gè)可選部分, ods具備數(shù)據(jù)倉(cāng)庫的部分特征和oltp系統(tǒng)的部分特征,它是“面向主題的、集成的、當(dāng)前或接近當(dāng)前的、不斷變化的”數(shù)據(jù)。由于決策支持系統(tǒng)特有的:不能充分了解需求;需求變動(dòng)大;實(shí)施周期時(shí)間長(zhǎng),但客戶要求見效快等特點(diǎn)。在制定企業(yè)級(jí)的bi系統(tǒng)方案時(shí),就會(huì)有諸多問題要考慮,在魚和熊掌不能兼得的情況下,做出選擇。