| Publisher | Vivan Technologies | ||
|---|---|---|---|
| Format | 386.1KB PDF | Date added | 12 Jun 2007 |
| Topics | Data Acquisition - ETL, Business Intelligence - Data Warehousing | ||
| Downloads | 123 | ||
To build a data warehouse various tools are used like modeling tools to design a warehouse, database tools to physically build the database and loading the data and programming languages to extract the data from sources, apply business transformations and load it in consistent format. To achieve this goal in data warehousing, most organizations were using self-developed custom codes. The data were extracted and transformed using COBOL, PL/SQL codes, Perl scripts, Shell programs, etc and loaded into the target warehouse using SQL loader, BCP, BULK loading. But these hand-coded ETL resulted in a lot of hard-to-maintain "Spaghetti" code and it is hard enough to get programmers to document it.
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