Data Warehouse Resource Directory http://www.beyoyo.net/index.php/main/dwdirectory Telecom Data Warehouse Design Http://yuanque.blogdriver.com/yuanque/342083.html Scenarius Sybaseiq Powermart mstrhttp://www.dwway.com/bbs/forum/thread.php? threadid = 10831 & setid = 0ETL's Consideration http://blog.blogchina.com/Article_10981.133690.html Data Warehouse system, ETL is key One ring. Said, ETL is a data integration solution, saying that it is a tool for pouring data. ETL has several characteristics, one is the data synchronization, it is not a time to finish the data, it is a regular activity, according to the fixed cycle, or even some people present the concept of real-time ETL. Second, the amount of data is generally huge, it is worth removing the process of flowing data into E, T and L. Data extraction, cleaning, conversion, and loading formation of serial or parallelism. The core of the ETL is that the process of t, that is, conversion, and the extraction and loading can generally be used as the input and output of the conversion, or they act as a separate component, which has no conversion components. High.
