For the empirical and numerical relation system of Example 2.5, write a numerical assignment satisfy the representation condition. I want you to write a new condition with the same idea as the example provided to you.

Database System Concepts
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ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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For the empirical and numerical relation system of Example 2.5, write a numerical assignment satisfy the representation condition. I want you to write a new condition with the same idea as the example provided to you.
59 of 618
Since all the relations are preserved in this way by the mapping, we can
define the mapping as a measure for the attribute. Thus, if we think of the
M
FIGURE 2.5 A measurement mapping.
84
72
The Basics of Measurement ■ 37
measure as a measure of height, we can say that Frankie's height is 84, Peter's
is 42, and Wonderman's is 72.
Not every assignment satisfies the representation condition. For instance,
we could define the mapping in the following way:
M(Wonderman) = 72
M(Frankie) = 84
M(Peter) = 60
Then three of the above relations are satisfied, but much taller than is not.
This is because Wonderman is much taller than Peter is not true under this
mapping.
Transcribed Image Text:59 of 618 Since all the relations are preserved in this way by the mapping, we can define the mapping as a measure for the attribute. Thus, if we think of the M FIGURE 2.5 A measurement mapping. 84 72 The Basics of Measurement ■ 37 measure as a measure of height, we can say that Frankie's height is 84, Peter's is 42, and Wonderman's is 72. Not every assignment satisfies the representation condition. For instance, we could define the mapping in the following way: M(Wonderman) = 72 M(Frankie) = 84 M(Peter) = 60 Then three of the above relations are satisfied, but much taller than is not. This is because Wonderman is much taller than Peter is not true under this mapping.
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