After some further analysis, you discover that the commission field in the Policies table is updated yearly

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After some further analysis, you discover that the commission field in the Policies table is updated yearly to reflect changes in the annual commission paid to agents on existing policies. Would knowing this information change the way in which you extract and load data into the data mart from the OLTP system?
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Modern Database Management

ISBN: 978-0133544619

12th edition

Authors: Jeff Hoffer, Ramesh Venkataraman, Heikki Topi

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