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Tera-Tom on Teradata SQL V12-V13 by Tera-Tom Coffing

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Chapter 1 - Teradata Parallel Architecture

Teradata Introduction

The world’s largest data warehouses commonly use the superior technology of NCR’s Teradata relational database management system (RDBMS). A data warehouse is normally loaded directly from operational data. The majority, if not all of this data will be collected on-line as a result of normal business operations. The data warehouse therefore acts as a central repository of the data that reflects the effectiveness of the methodologies used in running a business.

As a result, the data loaded into the warehouse is mostly historic in nature. To get a true representation of the business, normally this data is not changed once it is loaded. Instead, it is interrogated repeatedly ...

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