外文翻譯----數(shù)據(jù)庫和數(shù)據(jù)倉庫-全文預(yù)覽
【正文】 s by one process (the client) are sent to another process (the server) for execution. Database systems are no exception. In the simplest client/server architecture, the entire DBMS is a server, except for the query interfaces than interact with user and send queries or other mands across to the server. For example, relational systems generally use the SQL language for representing requests from the client to the server. The database server then sends the answer, in the form of a table or relation, back to the client. The relationship between client and server can get more plex especially when answers are extremely large. There is also a trend to put more work in the client, since the server will be a Bottleneck if there are many simultaneous database users. New Forms of Database and Data Warehouses ObjectOriented Database Objectoriented databases store data as objects that can be automatically retrieved and shared. Included in the object are the processing instructions to plete each database transaction. These objects can contain various types of data, including sound, graphics, and video as well as traditional data and processing procedures. The objects can be shared and reused. These features of 畢業(yè)設(shè)計（論文）外文翻譯 4 Objectoriented databases promises to facilitate software development through reuse and the ability to build new multimedia application that bine multiple types of data. Benefit of Odom’s is their ability to support application for the World Wide Web, as described in the focus on Technology. Objectoriented database are still a relatively new technology and can be much slower than relational systems for handing large quantities of data where there is a high volume of transaction processing. Hybrid objectrelational data bases have been developed that bine the capability of handing large numbers of transactions found in relational Dams with the capability of handing plex relationships and new types of data found in Odom’s. Hypermedia Database Hypermedia database manage data differently from object oriented DBMS. but they can also contain diverse types of data. They store data as “chunks”of information, with each chunk in a separate node. Each node can contain traditional numeric or character data or wholedocuments ,software programs, graphics, and even full motion video. Each node is totally independentthe nodes are not related by a predetermined organization scheme as they are in traditional database. Insured, user establishes their own links between nodes. The relationship among nodes is less structured than in a traditional DBMS. Searching for information does not have to follow a predetermined organization scheme. Users can branch directly form one node to another in any relationship they establish. For instance, a hypermedia database on automobiles might link basic product information with descriptive sales brochures, a video showing the automobile in action, and the location of authorized dealers. Data Warehouses Many panies have allowed their data to be stored in many separate systems that are unable to provide a console dated view of information usable panywide. One way to address this problem is to build a data data warehouse is a database that consolidates data extracted from various production and operational systems into one large organization’s core transaction processing systems are reorganized and bined with other information, including historical data so that they can be used for management decision making and analysis. In most cases, the data in the data warehouse can be used for reportingthe
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