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                                                                        DATABASE TABLE= A   table   is a collection of related data held in a structured format within a   database . It consists of   columns , and   rows . In  relational databases , and  flat file databases , a  table  is a set of data elements (values) using a model of vertical  columns  (identifiable by name) and horizontal  rows , the  cell  being the unit where a row and column intersect. [1]  A table has a specified number of columns, but can have any number of rows. [2]  Each row is identified by one or more values appearing in a particular column subset. A specific choice of columns which uniquely identify rows is called the  primary key . "Tab...

                                                   DATABASE MANAGEMENT SYSTEM      A database management system (DBMS) is system software for creating and managing  databases . The DBMS provides users and programmers with a systematic way to create, retrieve, update and manage  data . A DBMS makes it possible for end users to create, read, update and delete  data  in a database. The DBMS essentially serves as an interface between the  database  and end users or  application programs , ensuring that data is consistently organized and remains easily accessible. The DBMS manages three important things: the data, the database  engine  that allows data to be accessed, locked and modified -- and the database  schema , which defines the database’s logical structure. These three ...

A database is a data structure that stores organized information. Most databases contain multiple tables, which may each include several different fields. For example, a company database may include tables for products, employees, and financial records. Each of these tables would have different fields that are relevant to the information stored in the table. Nearly all  e-commerce  sites uses databases to store product inventory and customer information. These sites use a database management system (or  DBMS ), such as Microsoft Access, FileMaker Pro, or  MySQL  as the "back end" to the website. By storing website data in a database, the data can be easily searched, sorted, and updated. This flexibility is important for e-commerce sites and other types of  dynamic websites . Early databases were relatively "flat," which means they were limited to simple rows and columns, like a  spreadsheet . (See also " flat file database "). However, today's rel...

How to Format a Computer Need to learn how to format your computer? Formatting a drive prepares the surface of the disk to store new data. Computers are often formatted before they are sold, donated, or returned to employers. Likewise, computers with viruses or errors can be formatted and returned to their "out of the box" settings. How to Format a Computer with Windows 7 Warning  - Formatting hard drive information does not permanently erase the data. Even after a computer has been formatted, deleted files can be easily recovered. If you want to permanently wipe your hard drive by completely overwritting hard drive data, check out  WipeDrive . To format your hard disk during Windows 7 installation, you'll need to start, or boot, your computer using the Windows 7 installation disc or USB flash drive. Turn on your computer so that Windows starts normally, insert the Windows 7 installation disc or USB flash drive, and then shut down your computer. Restart your c...

HOW TO INSTALL WINDOWS 10 There are several ways to install Windows 10 on your PC, whether you’re upgrading from Windows 7 or 8, installing a new operating system from scratch, or reinstalling a fresh version of Windows 10. There are still  ways to get a free Windows 10 upgrade license , too. There are a variety of ways you can get a Windows 10 license for your PC, and many of them are still free. Upgrade from Windows 7 or 8 : Microsoft still  offers a free Windows 10 upgrade  to PC users who use accessibility tools. You can also still install Windows 10 and  enter a Windows 7 or 8 key in the installer  to receive a free Windows 10 upgrade license. Once you’ve performed the upgrade once, your PC has a Windows 10 license forever. So, if you upgraded when Windows 10 was released and downgraded shortly after,  you’re still eligible to upgrade  to Windows 10 for free. A license associated with your PC is stored on Microsoft’...

OPERATING SYSTEM (OS) An operating system (OS) is the program that, after being initially loaded into the computer by a  boot  program, manages all the other programs in a computer. The other programs are called  applications  or application programs. The application programs make use of the operating system by making requests for services through a defined application program interface ( API ). In addition, users can interact directly with the operating system through a user interface such as a command line or a graphical user interface ( GUI ). In a  multitasking  operating system where multiple programs can be running at the same time, the operating system determines which applications should run in what order and how much time should be allowed for each application before giving another application a turn. It manages the sharing of internal memory among multiple applications. It handles input and output to and from attached hardware devices, ...