Database

   A database looks like a can of garbage, if you view it outside. You will find that it looks like Microsoft Excel after open the cover. Each text box of Microsoft Excel can only be filled in several words, while a database can eat various things, from long article to movies. Actually, a database does not just store sundries. It can be searched and calculate data rapidly.

  A database looks like a trash can.

  This is the portrait of Microsoft Excel. Many text boxes inside You can fill in several words in each text box. These boxes are used to store data. However, you can fill each box with several words. The different between Microsoft Excel and a database is that data inside Microsoft Excel cannot be searched. You can only open it directly and find the data by your eyes. 

  A database looks quite like Microsoft Excel inside, but its storage is amazing. You can even fill each box with a movie. That is the reason many Websites use databases to store various data. At home, you can use it as a trash can. This is the sample of Microsoft SQL Server.

  You may wonder why Websites use databases. It is quite simple to answer to this question. You have to browser all the products in Amazon and eBay every time you visit them. If they did not use databases, you have to click millions of Web pages in order to find the things you want, just like entering refuse dumps. A database can store all the data, and fast provide specified information according to the requests of different visitors. Here the requests are the keywords in the search box.