Tutorials On Mysql Database

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MySQL is an open source relational database management system, the developer for the Swedish MySQL AB company, is now part of sun company. Oracle announced the acquisition of Sun Company in 2009, so MySQL may become Oracle's products. Because of its high performance, low cost and good reliability, MySQL has become the most popular open source database and is widely used in small and medium Web sites on the Internet. As MySQL matures, it is increasingly used for more large-scale ...

The MySQL tutorial does not use the rand () function to randomly read the database tutorial records, as well as Google the relevant files, found that everyone almost exclusively using ORDER by RAND () to achieve this, but in fact there are very serious performance problems. If your database has only hundreds of, and the number of calls is not many times, you love what method to use what method. But if you have 100,000 or 1 million or more data, then each time you execute the SQL with ORDER by rand () ...

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