What distinguishes the functions RANK() and DENSE RANK()? In the following emptbl table, how can I determine the nth salary?
DEPTNO EMPNAME SAL
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10 rrr 10000.00
11 nnn 20000.00
11 mmm 5000.00
12 kkk 30000.00
10 fff 40000.00
10 ddd 40000.00
10 bbb 50000.00
10 ccc 50000.00
If in the table data having nulls, what will happen if I want to find out nth salary?