Lowercase Sql

MySQL provides standard SQL pattern matching and a format based on pattern matching of extended regular expressions like Unix utilities such as vi, grep and sed. Standard SQL Pattern Matching SQL pattern matching allows you to match any single character with "_" and "%" with any number of characters (including zero characters). In MySQL, the default SQL mode is case-insensitive. Here are some examples. Note that you can not use = or! = While you are using SQL mode, and use LIKE or NOT LIKE to compare operators ...

It is well known that the system reads data from memory hundreds of times times faster than it does from the hard disk. So now most of the application system, will maximize the use of caching (in memory, a storage area) to improve the system's operational efficiency. MySQL database is no exception. 　　Here, the author will combine their own work experience, with you to explore the MySQL database Cache management skills: How to properly configure the MySQL database cache, improve cache hit rate. 　　When will the application get the data from the cache? Database read from server ...

In this lesson, we want to learn how to increase the intelligent processing capacity of the Web page. Basic functions Welcome to the third and final lesson of this tutorial. If you've learned the first and second lessons, you've mastered the basics of installing and programming MySQL and PHP. Here are some of the other functions of PHP that might be useful to you and make your development process simpler. 　　First, let's look at the document. You should know some basic concepts of the header file, right? The header file is an external file whose contents are included in the main program. ...

It would be faster to enclose the string in single quotes instead of double quotes. Because PHP searches for variables in double-quoted strings, single quotes do not. Note that only echo can do this: it's a "function" that takes multiple strings as arguments, Echo is a language structure, not a real function, so the function with double quotes). 1, if you can define the class method as static, as far as the definition of static, it will speed up nearly 4 times. 2, $ row ['id'] speed ...

As PHP programmers, especially novices, always know too little about the dangers of the Internet, for many of the external invasion are at a loss what to do, they do not know how hackers invaded, submitted to the invasion, upload vulnerabilities, sql Injection, cross-scripting and more. As a basic precaution you need to be aware of your external commits and do a good job with the first side of the security mechanism to handle the firewall. Rule 1: Never trust external data or enter information about Web application security, the first thing you must recognize is that you should not trust external data. External data (outside d ...

Intermediary transaction SEO diagnosis Taobao guest Cloud host technology Hall Many users have encountered such embarrassing things, because the server's security vulnerabilities, resulting in the loss of data, permissions have been illegally obtained. Servers are primarily those Web servers, data servers, DNS servers, and mail servers that hold Web sites. 　　Now the main reason why the Web server is hanging horse and black reasons and solutions. 　　The first can be roughly divided into the server itself and the site itself two aspects. The server aspect is as follows: 1 ...

Absrtact: 360 The newly released "2013 Chinese university website Safety Test Report" said that each of China's university websites were hacked 113 times a day (including scanning and other acts), of which the maximum number of attacks on the site up to tens of thousands of times. It is understood that the report data 360 the latest release of the "2013 Chinese University web site Safety Test report," said that each of China's colleges and universities on average every day by hackers attack 113 times (including scanning and other acts), of which the maximum number of attacks on the site up to tens of thousands of times daily. It is understood that the report data samples from January 1, 2013 to ...

Intermediary transaction SEO diagnosis Taobao guest Cloud host Technology Hall If you are in charge of the company's website, the site rented virtual host, it is best to look down. Have you received such emails such as "large flow customer Notification", "resource-consuming customer notification", or the site is closed by the access provider, the site can not login to upload, etc. Today deliberately sorted out an article on the "corporate Web site consumption of resources, large flow of radical cure" want to completely solve, you need to know the reason; To understand the reason, first of all, to the site to analyze the problems, as follows: 1. website is uploaded ...

Intermediary transaction SEO diagnosis Taobao guest Cloud host technology hall Xinhua Tianjin, June 14 (reporter Zhou Runjian) 360 The latest release of the "2013 Chinese University web site Safety Test report," said that each of the Chinese university websites are hacked 113 times a day (including scanning and other acts), The maximum number of sites attacked is up to tens of thousands of times a day. It is understood that this report data samples from January 1, 2013 to May 30, 2013 360 Web site security testing and 360 website Guardian Product database of the university website security data, a total of ...

The intermediary transaction SEO diagnoses Taobao guest Cloud host Technology Hall I am the XI ' an science and technology university will graduate a senior student, high together to do the site, remember at that time with the Oriental Web page king, to now use Notepad to modify the code to do the station for about 8 years, has not gone to what professional study, are groping themselves out, 　　Some time ago in helping a colleague to do search engine optimization, spent 2 hours rough made some adjustments, the effect is much better than not optimized before, below I from various aspects of the site to illustrate: (1) Why to optimize the site? Website optimization has been ...