Mysql Show Constraints

MySQL command line is to learn the MySQL database must master the knowledge, here is to introduce you to 10 easy-to-use MySQL command line, I hope you learn MySQL command line can help. 1, the structure of the display data table: mysql> DESCRIBE table name; (DESC table name) 2, the establishment of data tables: mysql> USE library name; / / enter the database mysql> CREATE TABLE table name (field name VA ...

If a computer manufacturer, its database holds machine and accessories product information. The table used to save the whole product information is called pc; the table used to save the parts supply information is called parts. There is a field in the pc table, used to describe the type of CPU used in this computer; there is a field in the parts table, the description of the CPU model, we can think of it as a list of all CPU models. Obviously, the CPU used by this manufacturer must be a model that exists in the supply information sheet. At this time, two tables ...

Overview How to deal with high concurrency, large traffic? How to ensure data security and database throughput? How do I make data table changes under massive data? Doubanfs and DOUBANDB characteristics and technology implementation? During the QConBeijing2009, the Infoq Chinese station was fortunate enough to interview Hong Qiangning and discuss related topics. Personal Profile Hong Qiangning, graduated from Tsinghua University in 2002, is currently the chief architect of Beijing Watercress Interactive Technology Co., Ltd. Hong Qiangning and his technical team are committed to using technology to improve people's culture and quality of life ...

With the explosion of information, micro-blogging website Twitter was born. It is no exaggeration to describe Twitter's growth with the word "born". Twitter has grown from 0 to 66,000 since May 2006, when the number of Twitter users rose to 1.5 in December 2007. Another year, December 2008, Twitter's number of users reached 5 million. [1] The success of Twitter is a prerequisite for the ability to provide services to tens of millions of users at the same time and to deliver services faster. [2,3,4 ...

Open source Hotspot Inventory 1984, Richard Stallman launched GNU and Free Softwarefoundation, which has been open source for more than 28 years. From the bottom of the operating system to advanced desktop applications, there are open source footprint. Linux, which is especially open source operating system, is a controversial issue and is subject to many commercial attacks. 　　Many people like to put open source and business together, to accuse Open source is how "irregular", "energy consumption", "instability" and so on, especially Microsoft. Talk about ...

The role of corporate websites in modern business is increasingly important, the internet has been widely used as a modern business in the four media, the characteristics of which can span time and space, under normal circumstances, the site is working through the company's Web site, users can understand the enterprise across time and space, using multimedia technology, enterprises can show users products, 　　Technology, business philosophy, corporate culture, corporate image, establish a modern corporate image, value-added enterprises intangible assets. The novice does the station first not to consider oneself will not write the program, what language also cannot ...

The most popular words in the mobile internet age are more important than smartphones, mobile apps, and investments-entrepreneurship. Countless people, funds and resources are flocking to the mobile internet, so that the whole industry at the beginning of the early days have "missed the Internet wave regret, must not miss this wave of waves" argument. All this makes the development of the whole mobile Internet show a thriving situation. In this wave, there are also a large number of basic service providers that are hidden behind the scenes to help mobile entrepreneurs get out of the business of IT operations and products that are never good.

There are a few things to explain about prismatic first. Their entrepreneurial team is small, consisting of just 4 computer scientists, three of them young Stanford and Dr. Berkeley. They are using wisdom to solve the problem of information overload, but these PhDs also act as programmers: developing Web sites, iOS programs, large data, and background programs for machine learning needs. The bright spot of the prismatic system architecture is to solve the problem of social media streaming in real time with machine learning. Because of the trade secret reason, he did not disclose their machine ...

From the second half of 2013, the media and new media analysis. Is the traditional media a outworn or a bold change in the face of the new media, which is increasingly thriving through mobile interconnection and social networking? IPTV counterattack is the whole industry a solo show, but only small-tip angle? Chance, invited to Beijing TV station Suzhou Street site of the new media work base, and Beijing TV New Media Center deputy Director Chiu and Cloud software CEO Zhang Fubo talk about the Beijing Network radio and television station cloud platform practice, close observation of radio and television enterprises private Cloud project construction, experience and future development direction. ...

This is the tenth year of my work, today is also my birthday, if the way to review, there should be a lot of stories, if you want to say, I always habitually from the 5th year of my work began, on the one hand 5 years ago the work experience is mediocre, unknown, lack of drama, basic in small companies, Traditional IT companies are hanging out and 5 years of work resumes will be more concerned about, because it is in TX, because there is a chance to do the experience of the product design, is exposed to a star position, on the other hand, because I was also called marking, in the design of the river, the word generation show that also ...