Databases on the main concepts, and then review data management techniques to the three stages of development, database development phase and the phase of the three main features to master database on the basic concepts, database system, an integral part of the main functions of the various . Master key entities, attributes and entity type defines the link between the type and characteristics. Three kinds of data model features and differences. Object-oriented data model basic features.

Databasesothemainconcepts.ppt

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