Mysql Reverse Order By

As the most popular open source database, MySQL is widely used in Web applications and other small and medium-sized projects. However, in many large IT companies, MySQL has gradually deviated from the original open source version after being highly optimized and customized, more like a branch, such as the Webscalesql of Facebook, which was not long ago open source. 　　Recently, Mr. Xiong has published a blog post, from the perspective of large-scale web site architecture development of the changes in MySQL application, here for you to share. This article mainly describes the different and ...

This article introduces a MySQL batch intercept the last separated part of the SQL statement to another field to have a friend in need of reference. --field images saved data is: A.jpg;b.jpg;c.jpg to the images of the last picture c.jpg assignment to Images_default execution of the SQL statement is the code as follows UPDATE product SET ' Image_ Default ' = REVERSE ...

Overview WEB attack is the mainstream technology of hacker attacks for more than a decade. The domestic manufacturers have long regarded WAF as the standard of security infrastructure. There are many security vendors in the market that offer WAF products or cloud WAF services. For the lack of their own security team, but also suffer from sql injection, xss, cc and other WEB attacks in the small and medium enterprises, the demand for WAF is also very urgent. WAF access to the current are the following: WAF products to buy security vendors using the cloud waf service, the domain name of the DNS server is set to cloud waf manufacturers to provide, or ...

A while ago, Facebook added graph search for post searches. After that, Facebook generated about 1 billion post,post indexes a day, and the amount of data was 700TB. These amazing numbers are no doubt challenging to index and build real-time query systems for these posts. So how does Facebook deal with this challenge? The following is mainly explained: Data collection Facebook's underlying data structure is mainly to meet the needs of fast iterative network services ...

After more than eight years of practice, from Taobao's collection business to today to support all of Alipay's core business, and in the annual "Double Eleven Singles Day" continue to create a world record for the transaction database peak processing capacity.

Most of the owners will choose the server to rent, but http://www.aliyun.com/zixun/aggregation/37981.html "> rental server will also encounter many problems, 　　This will be in the choice of a rental server carefully before the analysis of the server is good or bad! The main analysis is suitable for their own space and space speed. First we have to do an analysis, start-run-Input: Ping IP address-t if your ping value in 100MS, belong to the normal speed ...

The intermediary transaction SEO diagnoses Taobao guest Cloud host Technology Hall 2001 after graduating from high school, I take the dream of youth, Farewell to the hometown of friends and relatives, stepped into the fiery army barracks, back to six years of the military career of the ridge bumpy ke, i baigan anxious, a lot of thoughts, barracks is a big melting pot, here cast my iron-like Will, I have experienced a transformation from a social youth to a qualified soldier who has undergone a baptism and a test from the heart to the body, no matter how traumatic it may be, or how much frustration it will take to ensure that the task is fulfilled. Six years of time although honed ...

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What is Sina app Engine Sina app Engine (SAE) is the first public cloud computing platform (http://), which was developed in-house in August 2009 and officially launched the initial alpha version on November 3, 2009. sae.sina.com.cn), SAE is the core component of Sina's cloud computing strategy. &nbs ...

Intermediary transaction SEO diagnosis Taobao guest Cloud host Technology Hall 1, what is the directory submission? Everyone is familiar with the phone or directory Yellow pages. They contain a list of people or sorts of businesses in alphabetical order or by category. 　　Internet directories are basically the same, but they are known as web directories or online catalogs, and they are by category sites. In order for your site to be listed on these pages, you must first submit to the directory. If you do not submit your site directory differently, users will not be able to find your site unless they know what is due to an accident or input ...