Introduction - If you have any usage issues, please Google them yourself
The 21st century is the era of knowledge-based economy, organization and use of knowledge and information of a powerful weapon- the database will continue to be widely applied. Database (Database, or DB) is stored together a collection of related data is stored data "warehouse." The term originated from the 20th century, 50 s, the United States for the war needs, the case of the various information together into a computer. 60 s database to help design the Apollo moon rocket to promote the generation of database technology. 70 years, vigorous development of the database, network systems, and levels of the system occupy the market, and the relational database theory are maturing. 80 years, the relational database products are quite mature, and later with the distributed database systems (Distributed Database Systems), the database machine (Datsbase Machines), Knowledge Base (Knowledge Base) systems of knowledge machine. Now, database technology has become the computer field, one of the