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Difference between RANK and DENSE_RANK functions in SQL.

RANK generates the ranking within your ordered partition. Ties are assigned the same rank, with the next ranking(s) skipped. So, if you have 2 items at rank 2, the next rank listed would be ranked 4.

DENSE_RANK again gives you the ranking within your ordered partition, but the ranks are consecutive. No ranks are skipped even if there are ranks with multiple items.

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