Let us begin the database introduction by defining its concept:
“a collection of information organized and presented to serve a specific purpose.” (networkdictionary.com)
It can be either computerized or non-computerized (phone books or filing systems). We are going to concentrate on the former.
A database has many, many uses. For example, companies use it to keep employee records; the government, to keep files concerning different areas of administration. ..and even you may have one for personal use (i.e. to organize your own files, music…)
The main advantages of a computerized database involve speed of information retrieval, capability to update and delete information easily, security and multiple accesses; on the other hand, some disadvantages are implied, such as privacy and ethical matters, and the fact that the initial expense is high because of the software needed.
In this database introduction, it is important to take a look at terminology:
Also, keep in mind that every record that is in the same table has the same fields. A database is designed so that data is stored only once.
The terms “database” and “database management systems (DBMS)” are not equivalent. The latter is a mechanism used to manage the data.
This concludes the database introduction. Later on, we will take a look at more functions and terms.
