July 2010
Intermediate to advanced
448 pages
12h 22m
English
Content preview from Physical Database Design
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11.4 Exploring Query Execution Plans to Improve Database Design 205
11.4 Exploring Query Execution Plans to Improve
Database Design
The following example highlights some of the typical attributes of a query execution
plan, and although this example uses DB2 similar to a query execution plan, insights are
typical of the major vendors with their respective tooling. In this example we will look
Figure 11.4 Explain output in text.
206 CHAPTER 11 Query Execution Plans and Physical Design
at a fragment of a query execution plan for a complex query. The full query is query #20
from the TPC-H industry-standard benchmark (see www.tpc.org). The full query is ...
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