2014 Zhongguancun Large Data day on December 11, 2014 in Zhongguancun, the General Assembly to "aggregate data assets, promote industrial innovation" as the theme, to explore data asset management and transformation, large data depth technology and industry data application innovation and ecological system construction and so on key issues. The Conference also carries on the question of the demand and practice of the departments in charge of the government, the finance, the operators and so on to realize the path of transformation and industry innovation through the management and operation of data assets. In the afternoon financial @big data Forum, ...
The previous article introduced some basic concepts of data quality, data quality control as the basic link of Data Warehouse, is the foundation of guaranteeing the application of upper layer data. Data quality assurance consists mainly of data Profiling, data auditing and data revision (information correcting) three parts, the previous article describes the content of the information Profiling, Profiling the data in the process of obtaining the summary statistics, so the following ...
1, MySQL exists text and blob: (1), the same in the text or BLOB column storage or retrieval process, there is no case conversion, when not running in strict mode, if you assign a BLOB or text column exceeds the maximum length of the column type value, the value is intercepted to ensure that the appropriate. If the truncated character is not a space, a warning is generated. Using strict SQL mode produces an error, and the value is rejected rather than intercepted and given a warning. Blob and text columns cannot have default values. When a blob is saved or retrieved ...
In the process of designing a mobile phone product, we encounter many problems that appear to be very small and easily overlooked. It is these small problems that prompt the user's patience one after another and let users resent their products. Just after the debut of a friend did not go through the actual attention to the details of the small, often encounter similar problems, stressed that after many times, feel better to write down, to encourage new people. & http: //www.aliyun.com/zixun/aggregation/37954.html "> nbsp; ▣ ...
&http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp; Web site size to a certain degree, the code of various logic entangled together, will give maintenance and expansion of a huge obstacle, then our solution is actually very simple, that is refactoring, the logic of layering. Usually, Top-down can be divided into performance layer, application layer, domain layer, persistence layer. The so-called performance layer, and not just the model ...
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