数据库类型区分

数据库类型区分
数据库类型主要可分为:
网状数据库(Network Database)、
关系数据库(Relational Database)、
树状数据库(Hierarchical Database)、
面向对象数据库(Object-oriented Database)等。
商业应用中主要是关系数据库,比如DB2、Sybase、MS SQL Server、Informax、MySQL等。
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*n3jhJllRa57EuLhvEME1rAOw1G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*nTGp6bO5ci80GIODTduyBjoelnORFvDYA2AkY/xDVgxdfUf2lzYrQYnO+oP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