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Data Integration (Joins (Outer Joins (Full Outer Join (1, Kai, 1, pants, 2…
Data Integration
Joins
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Outer Joins
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Right Outer Join
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NULL, NULL, 3, Sunglasses
Full Outer Join
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NULL, NULL, 3, Sunglasses
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Imputation
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One way is to assign the average of all rows in both the test and training sets to every column with missing data