We first present a fine-grained description of an ETL process in terms of its core functionalities and elementary functions; these are then parallelized/distributed according to the MR paradigm. Our approach allows thereby the parallelization/distribution of the ETL at three levels: notably “...
www.i-scholar.in 相似文献BUSINESS INTELLIGENCE In this respect, the value proposition associated with BI reaches far beyond the capability to pull together and analyze data. In fact, this paradigm is... BM Dumitrita - 《Journal of Information Systems & Operations Management》 被引量: 2发表: ...
This process cleanses and transforms all data into proper formats that can be used for further transportation to the Warehouse Layer. For example, lots of collected information is financial numerics stored in random formats like “0.50” cents, “03,90”, and so o...
Learn why ETL and data preparation are vital for BI, enhancing data quality, integration, and insights. Unlock BI's full potential for data-driven success.
整个ETL过程可以大大缩短,并实现实时BI。 www.ibm.com 4. Athirdmethodisto havethesummarytablesrebuiltaftertheETLprocessusingSQL SUMandaggregate functions. 第三种方法是在ETL流程之后使用SQLSUM和汇总函数来重构汇总表。 www.ibm.com 5. CRISP-DMreferencefocusesondataextraction,transformation,loadingthetechnicalimp...
This process is vital to the success of your BI solution. It is what makes the difference between a professional, functional data warehouse versus one that is messy, insufficient, and unusable. The ETL process is also one of the longest and most challenging steps in developing a BI solution....
Data extracted from source server is raw and not usable in its original form. Therefore it needs to be cleansed, mapped and transformed. In fact, this is the key step where ETL process adds value and changes data such that insightful BI reports can be generated. ...
Before ETL, scripts were written individually in C or COBOL to transfer data between specific systems. This resulted in multiple databases running numerous scripts. Early ETL tools ran on mainframes as a batch process. ETL later migrated to UNIX and PC platforms. Organizations today still use ...
Therefore, we propose to model ETL processes using the standard representation mechanism denoted BPMN (Business Process Modeling and Notation). In this paper we present a BPMN-based metamodel for conceptual modeling of ETL processes. This metamodel is based on a classification of ETL objects ...
ETL能够转换不同结构/类型的数据集为统一的结构,以便后续使用BI工具生成有意义的分析和表报。 下面我们看一下ETL过程完整的流程图: ETLProcess.png Extract 提取有效的数据 Transform 将提取的数据转换为数据仓库模式/格式 构建keys:一个key是一个或多个数据属性的惟一标识实例,key的类型可以是主键(primary key)、外...