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Alex Rivera
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I have a SQL query written by someone else and I'm trying to figure out what it does. Can someone please explain what the Partition By and Row_Number keywords does here and give a simple example of it in action, as well as why one would want to use it? An example of partition by: (SELECT cdt.*, ROW_NUMBER () OVER (PARTITION BY cdt.country_code, cdt.account, cdt.currency ORDER BY cdt.country_code, cdt.account, cdt.currency) seq_no FROM CUSTOMER_DETAILS cdt);
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