The dense_rank()
window function returns the number distinct values of the order by
clause that are sorted before the current row +1.
SELECT DENSE_RANK() OVER (ORDER BY …)
FROM …
Similar functions: row_number()
, rank()
, percent_rank()
, cume_dist()
.
The rank()
window function is defined in ISO/IEC 9075:2016-2 as part of optional feature T611, “Elementary OLAP operations”.
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