January 2012
Intermediate to advanced
336 pages
11h 19m
English
Content preview from Express Learning: Database Management Systems
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14
Data Warehousing, OLAP, and Data Mining
1. What are decision-support systems? What are the various tools and techniques that support decision-making activities?
Ans: Decision-support systems (DSS) are systems that aim to extract high-level information stored in traditional databases (such as network, hierarchical, relational and object-oriented), and use that information in making a variety of decisions that are important for the organization. The various tools and techniques that support decision-making activities are data warehousing, online analytical processing (OLAP) and data mining. Data warehouses contain consolidated data from many sources, augmented with summary information, and covering a long time period. OLAP refers to the ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.