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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Summary
Smart database design, covered in Chapter 2, “Data Architecture,” showed why the database physical schema is critical to the database's performance. This chapter looked at the theory behind the logical correctness of the database design and the many patterns used to assemble a database schema.
- The three phases in database design are the conceptual (diagramming) phase, the SQL DDL (create table) phase, and the physical layer (partition and file location) phase. Databases designed with only the conceptual phase perform poorly.
- Normalization can be summed up as the three “Rules of One”: one group of items = one table; one item = one row; and one fact = one column.
- Generalization is the buffer against normalization over-complexity.
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