Learning Programming and database with Sbg

How does data mining work? While large-scale information technology has been evolving separate transaction and analytical systems, data mining provides the link between the two. Data mining software analyzes relationships and patterns in stored transaction data based on open-ended user queries. Several types of analytical software are available: statistical, machine learning, and neural networks. Generally, any of four types of relationships are sought: Classes : Stored data is used to locate data in predetermined groups. For example, a restaurant chain could mine customer purchase data to determine when customers visit and what they typically order. This information could be used to increase traffic by having daily specials. Clusters : Data items are grouped according to logical relationships or consumer preferences. For example, data can be mined to identify market segments or consumer affinities. Associations : Data can be mined to identif...

How to restore a Computer from System Restore Point? This option takes your PC back to an earlier point in time, called a system restore point. Restore points are generated when you install a new app, driver, or Windows update, and when you create a restore point manually. Restoring won’t affect your personal files, but it will remove apps, drivers, and updates installed after the restore point was made.   1. Right-click on the Start button, and then select Control Panel from the popup menu.   2. Search Control Panel for Recovery and select it. Advanced recovery tools are shown 3. Select Open System Restore > Next.   4. Choose the restore point related to the problematic app, driver, or update, and then select Next > Finish.   Note: If you’re not seeing any restore points, it might be because system protection isn’t turned on. To check, go to the Control Panel, search for Recovery, and then select Recovery > Configure System Restor...

Data Ware House Definition  A data warehouse is a “subject-oriented, integrated, time varying, non-volatile collection of data that is used primarily in organizational decision making. Typically, the data warehouse is maintained separately from the organization’s operational databases. There are many reasons for doing this. The data warehouse supports on-line analytical processing (OLAP), the functional and performance requirements of which are quite different from those of the on-line transaction processing (OLTP) applications traditionally supported by the operational databases. Data warehousing is a collection of decision support technologies, aimed at enabling the knowledge worker (executive, manager, and analyst) to make better and faster decisions. Fundamentals of Data warehousing The data in a data warehouse have the following characteristics : 1. Subject oriented — The data are logically organized around major subjects of the organization, e.g., around custom...

Create a Recovery Drive  On Windows 10 A recovery drive can help you troubleshoot and fix problems with your PC, even if it won’t start. To create one, all you need is a USB hard disk or flash drive. Windows will inform you of the capacity required for the drive.   1. From the task bar, search for Create a recovery drive and then select it. You might be asked to enter an admin password or confirm the User Account Control dialog. 2. When the tool opens, make sure Back up system files to the recovery drive is selected, then select Next. This will copy the system image to the recovery drive. Note: If you chose not to back up system files when you created your recovery drive on Windows 10, you won’t be able to use it to reinstall Windows 3. Connect a USB drive to your PC, select it, and then click Next > Create. A lot of files need to be copied to the recovery drive, so this might take a while.   Note: Everything on the drive will be deleted. 4. Wh...

Tim Berners-Lee: The Father of the World Wide Web Sir Timothy Berners-Lee is a British computer scientist who invented the World Wide Web. He received a knighthood from the British Queen for his efforts (so he is called ‘Sir’). He is director of W3C, which looks after the Web’s development. A leading British newspaper ranked him as the world’s greatest living genius. Today’s world would be very different without his discovery. Berners-Lee was born in 1955 to parents who were mathematicians and computer scientists. He grew up with numbers and electronics and managed to build his own computer. He went to Oxford University and was banned from using the computers for hacking. Berners-Lee graduated with a degree in physics. His first jobs after graduating were as a computer programmer and software developer.   Berners-Lee spent the 1980s on a project based on sharing and updating information online. In 1991, he put the first website online. It explained what the World Wide We...