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QusWhat is the purpose of the SQL LAG() window function? Qus


A. Retrieves the previous value in a result set based on a specified order
B. Returns the next value in a result set based on a specified order
C. Calculates the average value for each group of rows
D. Counts the number of rows in a result set


Solution
A. Retrieves the previous value in a result set based on a specified order



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