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Automated Physical Database Design and Tuning
book

Automated Physical Database Design and Tuning

by Nicolas Bruno
February 2011
Intermediate to advanced content levelIntermediate to advanced
253 pages
8h 4m
English
CRC Press
Content preview from Automated Physical Database Design and Tuning
8 Automated Physical Database Design and Tuning
EId Name Title Salary DId MId
25 Mary Engineer 90K 100 23
40 John Writer 65K 100 5
21 Peter Accountant 70K 101 3
... ... ... ... ... ...
Table Emp
DId Description City Budget
100 R&D Seattle 10M
101 Finance New York 1M
102 Sales Seattle 1M
... ... ... ...
Table Dept
FIGURE 1.2 Tables modeling employees and departments.
data source of a SQL query is the Cartesian product of each multiset refer-
enced in the FROM clause. The predicate in the WHERE clause serves as a filter
to restrict the set of tuples in the combined data source. The SELECT clause
reshapes the tuples that satisfy the WHERE clause, by selecting
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Publisher Resources

ISBN: 9781439815670