SQL Query to get first two highest column values from a table

I want to have a query in my sql which will r开发者_StackOverflow中文版eturn the result as -

I am having a table named employee with columns name,salary,address. The query should return the first two highest column values from the employee table.

This should be single query.

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If the highest column is salary, you do this:

select salary from employee
order by salary desc
limit 2

You would do the same for any other columns, just replace the column name in the SELECT and in the ORDER BY sections.