软考 系统架构设计师系列知识点之杂项集萃(91)
接前一篇文章:软考 系统架构设计师系列知识点之杂项集萃(90)第166题During the systems analysis phase, you must decide how data will be organized, stored, andmanaged. A( )is a framework for organizing, storing and managing data. Each file or table contains data about people, places, things, or events. One of the potential problems existing in a file processingenvironment is( ), which means that data common to two or more information systems is stored in several places.In a DBMS, the linked tables form a unified data structure that greatly improves data quality and access. A(n)( )is a model that shows the logical relationships and interaction among system entites. lt p
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