sql - MIN and MAX Oracle 10g -

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i have table sales column , date of sales column, , want select min , max , date of min , max response single max date , single min date, in oracle, don't know how it, idea?

thanks

from explanation looks need below:

1) select sales , date table_name sales = ( select min(sales) table_name)  2) select sales , date table_name sales = ( select max(sales) table_name)

in single query 

    select sales , date table_name sales = ( select min(sales) table_name)      union       select sales , date table_name sales = ( select max(sales)   table_name)

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