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InterviewSolution
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What Is The Use Of History Preserving Transform? |
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Answer» The History PRESERVING transform ALLOWS you to produce a NEW row in your target rather than updating an existing row. You can indicate in which columns the transform identifies changes to be preserved. If the VALUE of certain columns change, this transform creates a new row for each row flagged as UPDATE in the INPUT data set. The History Preserving transform allows you to produce a new row in your target rather than updating an existing row. You can indicate in which columns the transform identifies changes to be preserved. If the value of certain columns change, this transform creates a new row for each row flagged as UPDATE in the input data set. |
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