數(shù)據(jù)庫畢業(yè)設計---外文翻譯-在線瀏覽
2025-01-15 16:40本頁面
【正文】 ing processes are not employed until the mass of the data has been reduced by earlier filtering. It is impossible to be prescriptive about the range and levels of service that are available, but reference to one of the major bureaux operating in the region could certainly be a good starting point. Campaign Management and Analysis Again, this is an area where excellent support is available from the bestofbreed bureaux. They will provide both the operational support and software capabilities to mount, monitor and analyse your marketing 學士畢業(yè)論文 4 campaign, should you so wish. Their depth of experience and capabilities in the credit sector will often open up ine: cost possibilities from the solicitation exercise that would not otherwise be available to the new entrant. The First Important Applications of DBMS’ s Data items include names and addresses of customers, accounts, loans and their balance, and the connection between customers and their accounts and loans, ., who has signature authority over which accounts. Queries for account balances are mon, but far more mon are modifications representing a single payment from or deposit to an account. As with the airline reservation system, we expect that many tellers and customers (through ATM machines) will be querying and modifying the bank’ s data at once. It is vital that simultaneous accesses to an account not cause the effect of an ATM transaction to be lost. Failures cannot be tolerated. For example, once the money has been ejected from an ATM machine ,the bank must record the debit, even if the power immediately fails. On the other hand, it is not permissible for the bank to record the debit and then not deliver the money because the power fails. The proper way to handle this operation is far from obvious and can be regarded as one of the significant achievements in DBMS architecture. Database system changed significantly. Codd proposed that database system should present the user with a view of data anized as tables called relations. Behind the scenes, there might be a plex data structure that allowed rapid response to a variety of queries. But unlike the user of earlier database systems, the user of a relational system would not be concerned with storage structure. Queries could be expressed in a very high level language, which greatly increased the efficiency of
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