计算机专业外文翻译+原文-数 据库管理系统介绍
扬州大学计算机专业毕业设计(外文翻译)
外文资料
Database Management SystemsA database (sometimes spelled data base) is also
called an electronic database , referring to any
collection of data, or information, that is specially
organized for rapid search and retrieval by a
computer. Databases are structured to facilitate the
storage, retrieval , modification, and deletion of
data in conjunction with various data-processing
operations .Databases can be stored on magnetic
disk or tape, optical disk, or some other secondary
storage device.
A database consists of a file or a set of files. The
information in these files may be broken down into
records, each of which consists of one or more
fields. Fields are the basic units of data storage ,
and each field typically contains information
pertaining to one aspect or attribute of the entity
described by the database . Using keywords and
various sorting commands, users can rapidly
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扬州大学计算机专业毕业设计(外文翻译)
search , rearrange, group, and select the fields in
many records to retrieve or create reports on
particular aggregate of data.
Complex data relationships and linkages may be
found in all but the simplest databases .The system
software package that handles the difficult tasks
associated
with
creating
,accessing,
and
maintaining database records is called a database
management system(DBMS).The programs 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 programs.)
A DBMS can organize, process, and present
selected data elements form the database. This
capability enables decision makers to search, probe,
and query database 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
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扬州大学计算机专业毕业设计(外文翻译)
