The advantages of relational database and the problems faced by it

Looking back to the development of the database , database technology began in the late 60, through the hierarchical database, network database and relational database to enter the database management system (DBMS) phase, the research of database technology has been making progress. In the 80 's, relational databases became the mainstream of development, and almost all newly introduced DBMS products were relational. Relational database is an important milestone in the development of computer data management, which has the advantages of data structure, minimum redundancy, high program and data independence, easy to expand, easy to compile application, and so on, the larger information system is based on the design of structured database.

However, with the rapid development of network technology and software technology, especially the development of Internet and intranet technology, the application of unstructured data is increasing. Since the development of relational database from 1970 to now, although the function is more perfect, but the processing of data types is limited to numbers, characters and so on, the processing of multimedia information only stays in the storage of simple binary code files. However, with the improvement of users ' application demand, the development of hardware technology and the colorful multimedia communication method provided by Intranet/internet, the user's request for multimedia processing is rising from simple storage to recognition, retrieval and deep processing, it is the user calling out "general" The database server deals with complex data types such as sounds, images, time series signals, and videos that account for 70% of the total amount of information.

According to the data, in 1996, the global database market sales of nearly 4 billion U.S. dollars, is expected to 2000, the database market sales will reach 8 billion U.S. dollars. The huge growth potential comes from the processing needs of complex data types, making "hyper-media" databases dealing with complex data types the focus of investment research and development in companies