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Ch 12 Data Reduction and Splitting (12.1 Unique Rows (data often contains…
Ch 12 Data Reduction and Splitting
12.1 Unique Rows
data often contains duplicate rows
duplicates should be removed
two ways to remove duplicates
Partial match removal
removal of few rows
identical content
Conducting
sort rows
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few collumns
Complete Match
all collumns
special case of partial
Intro
Removing rows f
different parts
split rpws
Why do we split data?
Filtering
useful
splits date
two tables
based on data
set of data transformation
apply only to
subset of dat
two seperate tables
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