| Database designing is an important part of developing Management Information System (MIS),and the quality can directly affect the success of the whole system. With the development of database application field and extension of the scale, in order to confirm the databases designed is correct, efficient and short in developing cycle, people have deeply researched the database designing method and given many efficient methods. These methods have played an important role in the development of database technique and the application. However, the database scale is more larger, the application is more complex, the users' requirements are more critical, the data structure database system should hand is not single any more, but complex, the disadvantages of traditional method have been exposed to the people. The object-oriented technology can solve these problems very well. The object-oriented technology has been a new popular method in developing software since 1990's, and is also the main research direction of the current software methods. This paper has deeply researched database designing and management information system using the objct-oriented technology, and the main achievements acquired are as following:1. has compared a few current popular object-oriented methods; and pointed their advantages and disadvantages.2. has given a new method to analyze the requirements of database system with object-oriented method.3. has given the method building the object model of database system ,and dissertated the equivalence theorem of object model.4. has built the algorithm to transfer the object model to relation model.5. has quantificationally compared the object-oriented technology with traditional analysis and designing method using the decision theory,and indicated the advantages of the method this paper has dissertated.6. has developed an actual management system of chemical industryproducts about serving, sell and supplies, and has greatly improved thedeveloping efficiency. |
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