| Popis: |
Six stages of database system design were introduced which includes requirements analysis stage, concept and structure design stage, logic structure design stage, physical structure design stage, implementation stage, and stage of operation and maintenance. Then current research situation of database system was described by examples of distributed database system, knowledge base system and active database system. Finally, current research focus and development trend were pointed out combining with introduction of data warehouse, engineering database, statistical database, space database, etc. |
