What Is Foreign Key In Database With Example

With the rise of internet web2.0 websites, the relational database has become a very hot new field, the development of the non relational database products is very rapid. 　　But the traditional relational database in dealing with web2.0 website, especially the super large-scale and high concurrent SNS type web2.0 pure dynamic website already appeared to be powerless, has exposed many insurmountable problems, for example: 1, high configured--to the database higher concurrent reads and writes the demand WEB2.0 website to be based on user personalized information to generate real-time dynamic ...

The development of the big data industry has been included in the National Development plan, and in 2014, "Big Data" first appeared in this year's "Government work Report". 　　"Government work Report" pointed out that to set up new industries entrepreneurial innovation platform, in large data and other aspects of overtaking advanced, leading the future industrial development. Large data construction is inseparable from high-performance database software, unfortunately, the current database market in China, Oracle [micro-BO], ibm[Micro-BO] as the representative of the foreign database software is still in the dominant position, a lot of database software for the government procurement is still accustomed to using foreign products, ...

The document database of NoSQL database technical characteristics Today's cloud computing practitioners are not unfamiliar with the term nosql, though many technicians have long been working on relational databases, but now they are looking forward to nosql technology. The transition from relational to NoSQL databases is definitely a big change to be considered for businesses. This involves not only the changes in software, but also the conceptual changes in data storage. Most non-relational databases have fast and scalable features. By discarding relational storage models and schemas, relationships ...

The logical design of database is a very broad problem. In this paper, the main key design of the table is discussed in the design of MS SQL Server, and the corresponding solutions are given. Primary key design status and problems about database table primary key design, in general, based on business requirements, based on business logic, the formation of primary key. For example, when sales to record sales, generally need two tables, one is the summary description of the sales list, records such as sales number, the total amount of a class of cases, and the other table record of each commodity ...

--Odau China CEO Xiatao (article) (the first in the "Import and Export manager" 2010 11th, reproduced please specify the source) in the last century 90, E-commerce has been successfully used. In Europe and America, E-commerce applications precede the emergence of E-commerce theory, and in China, the introduction of E-commerce theory, domestic enterprises began to practice e-commerce. The theory of e-commerce in China is not based on the basic national conditions, and there is not enough practice as the basis, the application of E-commerce theory is unavoidable. Coupled with the rapid rise of some e-commerce platform, causing domestic very ...

Penghani (Hanni) has been engaged in marketing, PR, branding and so on in foreign-funded enterprises such as Nokia and IBM, and is now a senior marketing manager in China, a large it foreign company. With 16 years of extensive marketing experience, Hanni has a simple self-introduction on social media: "Brainstorm with the smartest people in the industry, think creatively, ideas, write numerous ppt, and because effective marketing strategies do help companies make more money." Hanni has a set of logical theories and experiences for the marketing of foreign companies. How to apply foreign experience to local enterprises, Hann ...

Intermediary transaction SEO diagnosis Taobao guest Cloud host technology Hall yahoo!--search engine King, one of the earliest directory index, is currently the most important search service site, in all Internet search applications accounted for about 36% of the share. In addition to the main station (Mother Yahoo), also has the United States metropolitan cities (Yahoo cities, such as the Chicago Sub-station), country stations (such as Yahoo China) and international regional stations (such as Yahoo Asia). The registration site in its database is either in the form or ...

Illustrations/Chen Ting cosmetics, in countless brand wars, has already become a red Sea of blood, but there is still a blue sea ——— medicine makeup. Domestic drug market demand is growing at a rate of more than 8% a year, is expected to reach 8 billion U.S. dollars in 2010.　　At present, the domestic retail sales of pharmaceutical cosmetics only accounted for 2% of total cosmetic sales, pharmaceutical market has a huge growth potential. However, the domestic drug makeup is still Vichy, Avene, Skin Spring Three foreign brands of the world, the domestic drug makeup breakthrough where? Chen Lizi Drug Makeup will be on the market at the end of this month.

New competitive Network marketing expert e-commerce Dr. Feng Yingjian in its "Network Marketing Foundation and Practice", wireless network Marketing in addition to legal and industry standards and other macro-factors, wireless network marketing applications are mainly faced with the specific problems include: Wireless network marketing in the user licensing problem, wireless network marketing method problems, Wireless Network Marketing quality of service issues, user personal information protection issues. The issue of licensing and personal information protection is the foundation of establishing the library of licensed numbers, and the licensed number library is the key to the success of wireless marketing. The previous paragraph because the Advertiser without user Xu ...

The intermediary transaction SEO diagnoses Taobao guest cloud host technology Hall first lesson: What is the Google ranking technology? After my years of practice and research, in our commonly used dozens of of network promotion methods, Google search engine ranking is the most effective one. Since: 1. Google is the world's most users of the search engine; 2. The quality of the passenger flow through the search engine is very high, most of them are your potential customers; 3. Once you get a good ranking on Google, it will continue to bring you customers every day, 4. Only ...