Wednesday, February 3, 2010

Database definitions

1. Field: In database systems, fields are the smallest units of information you can access.



Record: Records are composed of fields, each of which contains one item of information.


File: Almost all information stored in a computer. Must be in a file. There are different types of files: data files, text files, program files, directory files and so on.


Query: In the method, the system presents a blank record and lets you specify the fields and values that define the query.


Database: Traditional databases are organised by field, records and files.


Report: A formatted and organized presentation of data.


DBMS: A collection of programs that enables you to store, modify, and extract information from a database(Database Management system).


Data dictionary: a file that defines the basic organization of a database.


Data type: we can usually do this through -, %, : and $. This indicates the datatypes.


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(If the image is not clear please click on the picture to give you a better view of it.)
3. Some of the most common databases we use is our conatcts mobiles. Also we are in a database in our school. As soon as we swipe our card on the machine we can view our details and more necessary stuff for school. Our Ipods are in a database because of the songs put into it. They are all in categories e.g most recently played. The most important one we use everyday, GOOGLEEE.

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