How to find third highest salary from a database table by sql or mysql

By this query you can find all possible(nth) highest salary starting from 2nd to nth.Just palace your find number salary in the place of `n` and you can get result. Here I have wrote the `n`th highest salary.

Select salary
from `tablename`
order by `columnname` desc
limit n-1,1;

Write 2 instead of n-1 to find the 3rd highest salary.Write 1 instead of n-1 to find the 2nd Highest salary.