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 …
Related
Similar functions:
row_number()
,rank()
,percent_rank()
,cume_dist()
.
Normative References
The rank()
window function is defined in ISO/IEC 9075:2016-2 as part of optional feature T611.