January 2003
Intermediate to advanced
300 pages
15h 18m
English
Content preview from Data Quality
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8.3 Profiling Properties for Columns 165
around is that they will help you identify inconsistencies in representation within
a column as well as across columns in the same or multiple databases. For exam-
ple, does the SOCIAL_SECURITY_NUMBER follow a pattern of 999999999
or 999-99-9999? It is very helpful to be able to identify these differences, in that
this is a common cause of problems in integrating or aggregating data.
Empty Condition Rules
Every column has one or more rules regarding the NULL condition. The rule
may be that none are allowed. It may allow values indicating the NULL condi-
tion but not restrict itself as ...
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