数据库设计的重要性有哪些?
数据库设计的重要性有:(1)数据库设计的优劣将直接影响信息系统的质量和运行效果。(2)设计一个结构优化的数据库是对数据进行有效管理的前提和产生正确信息的保证。
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Passage 3 Questions 11 to 15 are based on the following passage. Ours is essentially a tragic age, so we refuse to take it tragically. The disaster has happened, we are among the ruins, we start to build up new lit
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