Decode Function Example

We want to do not only write SQL, but also to do a good performance of the SQL, the following for the author to learn, extract, and summarized part of the information to share with you! (1) Select the most efficient table name order (valid only in the Rule-based optimizer): The ORACLE parser processes the table names in the FROM clause in Right-to-left order, and the last table in the FROM clause (the underlying table driving tables) is processed first, In the case where multiple tables are included in the FROM clause, you must select the table with the least number of records as the underlying table. If...

Another Christmas, I believe many people have begun to think about where to eat Christmas dinner, how to spend. At this time of year, consumers busy, excited, choose a large number of cinemas, restaurants, large and small shopping malls, concerts, electric dealers are also trying to woo consumers, promotional discounts are pulling off the prelude to the annual hot season. This winter is slightly different from previous years, there are 300 million mobile internet users all over China (digital source "CNNIC 28th Network Development Status Statistics Report"), of which 100 million people with 3G (Ministry of Industry as of this year September data), mobile phone shopping user size estimates reach 140 million (IR ...

What kind of smart TV is the best? What kind of smart TV is the most cost-effective? In the domestic intelligent television industry "surging" in the present, the lack of a unified evaluation of intelligent television standards, so that consumers at a loss. A few days ago, tiger sniff nets made a bold attempt to 100 of IT professionals to solicit opinions, after the summary commissioned by the survey company number 100 to accept 10,000 consumers vote, and finally determine the operation of convenient, interconnected, human memory, such as 10 major functional standards to become consumers very much valued and the inner needs of important standards This "People 10" is also the world's first people ...

Virtual application technology and private cloud computing provide enterprise IT managers with a new method of "centralized control, remote application", and the network architecture implemented by them almost supports all the current applications and easily realizes the application mode of remote access. Printing is essential for many applications. Relative to cloud data, cloud computing virtual world, print is actually physical output, always have to get the hand to complete. Whether a virtual application can be printed or not is related to the integrity of the virtual application. In order to get the service side of the virtual application of the printing completely like the local application of the same feeling, need to ensure that ...

Color TV enterprise propaganda step too fast, platform content Short board highlights a few days ago, "2012 China 3D product consumer Trend high-end seminar" held in Beijing, the "2011 China Cloud TV Development White paper" officially published, for the first time to China's cloud TV industry development of panoramic scanning and in-depth interpretation. It is understood that the "white paper" by the Chinese Electronic Video Industry Association, China Consumer Electronics Industry Development Center and other agencies to draft. Since 2011, the domestic six big color TV enterprises almost simultaneously launched various models of cloud television. Two times in cloud computing revolution ——— cloud Computing Technology Core Cloud 1.0 ...

PHP cookies Use the detailed tutorial 1, set cookies PHP with the Setcookie function to set cookies. It is important to note that cookies are part of the HTTP protocol header and are used to pass information between browsers and servers, so you must call the cookie function before any content output that belongs to the HTML file itself. The Setcookie function defines a cookie and attaches it to the back of the HTTP header, the prototype of the Setcookie function is as follows: int Set ...

Virtual application technology and private cloud computing provide enterprise IT managers with a new method of "centralized control, remote application", and the network architecture implemented by them almost supports all the current applications and easily realizes the application mode of remote access. Printing is essential for many applications. Relative to cloud data, cloud computing virtual world, print is actually physical output, always have to get the hand to complete. Whether a virtual application can be printed or not is related to the integrity of the virtual application. In order to get the server-side virtual applications to print exactly like the local application ...

Intermediary transaction http://www.aliyun.com/zixun/aggregation/6858.html ">seo diagnose Taobao guest cloud host technology Hall on the Internet search this information, found that a lot of articles are written earlier, but also written relatively shallow, Search results are not that much, there is no real in-depth topic to discuss the Chinese URL is a lag in favor of SEO. The Mad bird smoked a little time today for a detailed introduction. If there are floating over the master, also welcome to show ...

Web Capture-morning news reporter key in the current domestic mobile Internet domain, two-dimensional code has become a common access to information, but with such as mobile phone viruses, malicious programs, phishing, such as the spread of the two-dimensional code of the potential risk is also increasing.　　The two-dimensional code scanning service provider and the mobile phone security manufacturer's common reminder that the face of the site to provide the source of unknown two-dimensional code, in the use of mobile phones to decode should be more vigilant. Two-dimensional code security risk is easy to ignore recently, "Guangzhou Network Police" official micro-blog reminded that: Mobile virus can be transmitted through two-dimensional code, such a virus will be disguised as ...

Tianjin Rui Yin Technology Co., Ltd. Technology director Pan Electronic enthusiasts Network: audio technology in the consumer market application is not uncommon, I believe that everyone will not be unfamiliar with audio products-high-fidelity (HiFi) audio, car audio, subwoofer, cell phone speakers, headphones and so on. Now a bit HiFi audio field experts say that audio is actually not as simple as imagined, "bad to do, the water is very deep!" "The product can be made in half by luck and by experience." Pan, a technical director from Tianjin Rui Yin Technology Co., Ltd. expressed the above views. The field of audio technology seems simple, actually ...