It provides support for richer object structures and powerful query - oriented functions . this kind of dbms can meet the requirement of some newly emerging application areas , such as cax , gis and ois . now , the object - relational database ( ordb ) technology is regarded as one of the most promising research and product development directions 對(duì)象關(guān)系數(shù)據(jù)庫(kù)技術(shù)是在繼承關(guān)系數(shù)據(jù)庫(kù)技術(shù)的基礎(chǔ)上,增加面向?qū)ο筇匦?,使面向?qū)ο蠹夹g(shù)與關(guān)系數(shù)據(jù)庫(kù)技術(shù)緊密結(jié)合,可滿足cax 、 case 、 ois 、 gis等應(yīng)用領(lǐng)域的需求而發(fā)展起來(lái)的一種新型數(shù)據(jù)庫(kù)技術(shù),它既具有管理復(fù)雜數(shù)據(jù)的能力,又能提供強(qiáng)有力的查詢功能,是數(shù)據(jù)庫(kù)研究和產(chǎn)品發(fā)展的一個(gè)重要方向。