Mysql Floor

In our development of the efficiency has been a problem, especially for a lot of large data operations, today we ran into a random query data, at first we may think of the simplest order by RAND () to operate but the efficiency is not flattering ah. Recently, because of the need to study the MySQL random extraction implementation method. For example, to randomly extract a record from the TableName table, the general wording is: SELECT * from TableName ORDER by RAND () LIM ...

Recently due to the need to study about MYSQL based random extraction method. For example, to randomly extract a record from the table table, we generally write: SELECT * FROM tablename ORDER BY RAND () LIMIT 1. However, I checked the official MYSQL manual, which prompts for RAND () probably means that the ORDER BY clause can not be used inside the RAND () function, because this will lead to multiple data columns were swept ...

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Construction of enterprise security building open source SIEM platform. SIEM (security information and event management), as its name implies, is a management system for security information and events. It is not a cheap security system for most enterprises. This article uses the author's experience to introduce how to use open source software to analyze data offline and use attack modeling Way to identify attacks. Review the system architecture to the database, for example, through logstash to collect mysql query log, near real-time backup ...

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Banks, retailers, Google and even the National Security Agency praise the big data for forecasting and analytics. In fact, in this wave of new analytical wave, there is more interesting big data display space, this is the gaming industry. In the gambling industry, digital analysis and intelligent forecasting have become the cornerstone of a foothold. Practitioners face this once-in-a-lifetime massive amount of data processing technology and will undoubtedly choose to readily accept them in order to increase the possibility of digging potential wealth. Big data in the gaming industry is the foremost application of the results forecast, I believe we must have thought of. British gaming company Pad ...

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