Which database does Facebook & Google use ?

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Facebook has moved to a NoSQL database named HBase. Google uses their own system called BigTable. What is NoSQL ? NoSQL is a term used to designate databases which differ from classic relational databases. NoSQL database management systems are useful when working with a huge quantity of data when the data's nature does not require a relational model. The data can be structured, but NoSQL is used when what really matters is the ability to store and retrieve great quantities of data, not the relationships between the elements.
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Create Desktop Shortcut For "Safely Remove Hardware "

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1. First You Right Click on your desktop and Click on New and Click on Shortcut from the list.
2. Now It will ask you the location. Just Type the below code in it.
rundll32.exe
shell32.dll,Control_RunDLL
hotplug.dll
3. Now you click on next .
4. Now give a desired Name for your Shortcut and Click on Finish Button.

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