August 2012
Intermediate to advanced
1416 pages
33h 39m
English
book
Microsoft SQL Server 2012 Bible
by Adam Jorgensen, Jorge Segarra, Patrick LeBlanc, Jose Chinchilla, Aaron Nelson
Content preview from Microsoft SQL Server 2012 Bible
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Data Warehousing
A data warehouse is the structural foundation of most OLAP and BI solutions. Data warehouses, in most cases, are less normalized than the OLTP databases that act as its sources. A typical data warehouse contains two types of tables: facts and dimensions. Fact tables contain the measurable values, such as sales, number of sales, and count of items, to mention a few. The values are often referred to as measures; dimensions categorize or group those measurable values. As SQL Server has evolved, so has its capability to build OLAP solutions on database structures that are not data warehouses. However, using a data warehouse as the data source has several benefits and offers the developer a seamless process for design and data refresh.
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