首页 > Linux操作系统 > Linux操作系统 > Objectives of the Relational Model

Objectives of the Relational Model

原创 Linux操作系统 作者:lawzjf 时间:2007-07-10 00:00:00 0 删除 编辑
  1. To provide a high degree of data independence.
  2. To provide a community view of the data of spartan(严格的) simplicity, so that a wide variety of users in an enterrprise, ranging from the most computer-naive to the most computer-sophiscated, can interact with a common model(while not prohibiting superimposed user views for specialized purposes).
  3. To simplify the potentially formidable(困难的) job of the DBA.
  4. To introduce a theoretical foundation (albeit(虽然) modest) into database management(a field sadly lacking in solid principle and guidelines).
  5. To merge the fact-retrieval and file-management fields in preparation for the addition at a later time of inferential(推论的) services in the commercial world.
  6. To lift database application programming to a new level - a level in which sets (and more specifically relations) are treated as operands instead of being processed element by element.

内容摘自C. J. Date的书Database In Depth, 其引用的是E. F. Codd 1974年的文章--Recent Investigation into Relational Data Base Systems中的内容。

来自 “ ITPUB博客 ” ,链接:,如需转载,请注明出处,否则将追究法律责任。

上一篇: 有出息靠啥?
请登录后发表评论 登录


  • 博文量
  • 访问量