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2025-01-27 11:57本頁面
【正文】 intended to be all things to all people. Of course, such lofty goals are rarely fulfilled. 大連交通大學(xué) 2021 屆本科生畢業(yè)設(shè)計(jì) (論文 )外文文獻(xiàn)翻譯 5 While the initial release of ADO lacked many of Rod’s features, I believe that ADO offered parable functionality. Certain RDO features, such as mixed cursors, have yet to be implemented in ADO, but these features are few and far between. In fact, I39。t save you. Instead, you39。s object model closely resembles the hierarchy of structures in the ODBC API. Programmers found that RDO provided much faster access to client/server database systems, such as SQL Server and Oracle, than DAO did. Although those familiar with the ODBC API quickly learned how to work with the RDO object model, developers lacking experience with that API, such as those who had been using DAO, found the RDO technology difficult to use. The object model itself wasn39。t permit programmers to access some of the richer, 大連交通大學(xué) 2021 屆本科生畢業(yè)設(shè)計(jì) (論文 )外文文獻(xiàn)翻譯 4 more powerful features of SQL Server and Oracle, such as output and return parameters on stored procedures. One of my coworkers likes to say that using DAO to work with an Oracle database is like performing brain surgery on you…without anesthetics…while wearing oven mitts. Extreme? Yes—but he does have a point. DAO is tuned to work with desktop databases, not client/server databases. Frustrated by DAO39。s predecessors: DAO and RDO. Data Access Objects DAO was originally designed to interact with Microsoft Access databases. Although you can use DAO to access SQL Server and Oracle databases, many developers plain about DAO39。 Trips 2021. One of the goals of ADO is to simplify data access. ADO is built upon some fairly plex technologies—OLE DB and ODBC (open database connectivity)—and is designed to allow you to programmatically access and modify data stored in a wide variety of databases. This broad reach is a departure from previous data access technologies. For the sake of parison, let39。大連交通大學(xué) 2021 屆本科生畢業(yè)設(shè)計(jì) (論文 )外文文獻(xiàn)翻譯 1 Database Management System Source： Database and Network Journal Author： David Anderson You know that a data is a collection of logically related data elements that may be structured in various ways to meet the multiple processing and retrieval needs of anizations and individuals. There’s nothing new about data baseearly ones were chiseled in stone, penned on scrolls, and written on index cards. But now database are monly recorded on magically media, and puter programs are required to perform the necessary storage and retrieval operations. The system software package that handles the difficult tasks associated with created, accessing, and maintaining database records is in a DBMS package establish an interface between the database itself and the users of the database. (These users may be applications programmers, managers and others with information needs, and various OS programmers.) A DBMS can anize, process, and present selected data elements from the database. This capability enables decision makers to search. Probe, and query data contents in order to extract answers to nonrecurring and unplanned questions that aren’t available in regular reports. These questions might initially be vague and/or poorly defined, but people can “browse” through the database until they have the needed information. In short, the DBMS will “manage” the stored data items and assemble the needed items from the mon database i
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