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数据库是什么，它是做什么用的？

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Jun 07, 2016 pm 03:35 PM

Whatdatabasewhat isuse

总是在说要学数据库，记得一位老师给我们说过在大学学会一门编程语言，外加数据库，最后学好网络编程，那我们在毕业后找工作时是很容易的。学习了有一段时间的数据库了，但总是在认识名词，像ADO（ActiveX Data Object）、DAO（Data Access Object）、RDO（R

总是在说要学数据库，记得一位老师给我们说过在大学学会一门编程语言，外加数据库，最后学好网络编程，那我们在毕业后找工作时是很容易的。学习了有一段时间的数据库了，但总是在认识名词，像ADO（ActiveX Data Object）、DAO（Data Access Object）、RDO（Remote Data Object）、ODBC（Open Database Connectivity）、OLEDB（Object Linking and Embedding, Database）等等，但一直迷惑我的是数据库到底是什么，它是干什么的，在此我有必要好好了解下。

在计算机课本中数据库是被这样解释的：数据库是计算机应用系统中的一种专门管理数据资源的系统。数据有多种形式，如文字、数码、符号、图形、图像以及声音等。数据是所有计算机系统所要处理的对象。人们所熟知的一种处理办法是制作文件，即将处理过程编成程序文件，将所涉及的数据按程序要求组织成数据文件，用程序文件来调用。数据文件与程序文件保持着一定的对应关系。在计算机应用迅速发展的情况下，这种文件式方法便显出不足。比如，它使得数据通用性差，不便于移植，在不同文件中存储大量重复信息、浪费存储空间、更新不便等。数据库系统便能解决上述问题。数据库系统不从具体的应用程序出发，而是立足于数据本身的管理，它将所有数据保存在数据库中，进行科学的组织，并借助于数据库管理系统，以它为中介，与各种应用程序或应用系统接口，使之能方便地使用数据库中的数据。

其实通俗点解释数据库就是"按照数据结构来组织、存储和管理数据的仓库",在经济管理的日常工作中，常常需要把某些相关的数据放进这样"仓库"，并根据管理的需要进行相应的处理。例如，一些单位常常要把职工的基本情况(比如姓名、性别、年龄、工资、基本状况等)存放在表中，这张表就可以看成是一个数据库，通过它就可以根据需要随时查询某职工的基本情况，也可以查询某个年龄段内的职工人数等等。这些工作如果都能在计算机上自动进行，那我们的人事管理就可以达到极高的水平。此外，在财务管理、仓库管理、生产管理等管理事业中也需要建立众多的这种"数据库"，使其可以利用计算机实现财务、仓库、生产的自动化管理。说白了，数据库就像是按行列顺序排列的很科学的数据集合。可以随时按某种顺序（或行或列）进行添加，想用时随时可以按任意一种顺序读取数据，十分方便。

看了这么多估计你也眼花缭乱了，其实简单地说数据库就是一组经过计算机整理后的数据，存储在一个或多个文件中，而管理这个数据库的软件就称之为数据库管理系统。一般一个数据库系统（Database System）可分为数据库（Database）与数据管理系统（Database Management System，DBMS）两个部分。是不是对数据库有了初步的了解呢数据库是什么，它是做什么用的？

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