If Condition In Oracle

"IT168 Technical Documentation" Since Oracle and HP launched Exadata, I have been very concerned about this product, and previously wrote an Oracle database machine introduced it. 　　Last year, Oracle and Sun merged to launch Oracle Exadata V2, which has several changes compared to previous generations: first, using sun hardware; second, it claims to support OLTP applications; third, Oracle 11g R2 offers more new features. Exadata S ...

Content Summary: The data disaster tolerance problem is the government, the enterprise and so on in the informationization construction process to be confronted with the important theory and the practical significance research topic. In order to realize the disaster tolerance, it is necessary to design and research the disaster-tolerant related technology, the requirement analysis of business system, the overall scheme design and system realization of disaster tolerance. 　　Based on the current situation of Xinjiang National Tax Service and the target of future disaster tolerance construction, this paper expounds the concept and technical essentials of disaster tolerance, focuses on the analysis of the business data processing of Xinjiang national tax, puts forward the concrete disaster-tolerant solution, and gives the test example. Key words: ...

Absrtact: 1, the future used car market fortress in the C-terminal pricing right by the founder of Zhaopeng United States 2013 years of new cars and used cars trading volume of about 12 million: 42 million, about 1:3 of the proportion. If the rate of 3 to 4 times per new car is replaced in the 15 life cycle, 1, the future of the "fortress" of the second-hand market will be priced in the C-end by the Zhaopeng founder of the United States 2013 years of new cars and used cars trading volume of about 12 million: 42 million, about 1:3 percentage. If you press each new ...

The greatest fascination with large data is the new business value that comes from technical analysis and excavation. SQL on Hadoop is a critical direction. CSDN Cloud specifically invited Liang to write this article, to the 7 of the latest technology to do in-depth elaboration. The article is longer, but I believe there must be a harvest. December 5, 2013-6th, "application-driven architecture and technology" as the theme of the seventh session of China Large Data technology conference (DA data Marvell Conference 2013,BDTC 2013) before the meeting, ...

As we all know, Java in the processing of data is relatively large, loading into memory will inevitably lead to memory overflow, while in some http://www.aliyun.com/zixun/aggregation/14345.html "> 　　Data processing we have to deal with massive data, in doing data processing, our common means is decomposition, compression, parallel, temporary files and other methods; For example, we want to export data from a database, no matter what the database, to a file, usually Excel or ...

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...

21st Century Economics report Huang for a long time, the "war" between SAP and Oracle (NASDAQ:ORACLE) is almost synonymous with Germany's classic case of precision innovation against open innovation in the United States. Both are supporters of the world's top 500 companies. The former is the world's largest business applications, enterprise resource Planning (ERP) solutions and independent software suppliers, Europe's largest software company, the latter is the world's largest enterprise software companies. As the two giants of business application software, the infighting between them never stops. 20th century eighty or ninety years ...

To analyze the situation, the first thing that needs to be figured out is exactly what stage the whole cloud computing is now going to and where it will go? The ecosystem of cloud computing in the United States Last March, I went to the United States to visit a number of cloud computing companies After the biggest feeling is that IaaS Amazon services such as AWS and RackSpace has been very popular, which supports Engine Yard, Heroku and many other PaaS platform together for more XaaS service companies and other social, mobile Internet entrepreneurs in the field The company continues to rise provided ...

When it comes to big data, it has to do with Alibaba. The world's leading E-commerce enterprise, the amount of data processed every day is unmatched by any other company, it is also transforming into a real data company--mysql is an important weapon in the transformation of Alibaba. 　　A database architect who interviewed Ali, who believes Ali has the best performance of open source MySQL, beyond any relational database and NoSQL. In the 2009, Oracle acquired the copyright of MySQL by acquiring Sun, and the industry began to question the use of Oracle ...

Windows http://www.aliyun.com/zixun/aggregation/13357.html ">azure currently does not directly provide MySQL database services, but there is a collaboration with CLEARDB to provide MySQL Database services, or use the Windows Azure virtual machine (Windows Server or Linux Server) service to establish your own MySQL service ...