When using SELECT can you modify the value of a returned field based on other fields?

Question

When using MySQL SELECT can you change the value of a returned field based on other fields?

For example, if I have this select:

SELECT city,state,cou         


        

Answer 1

Update(misprints corrected):

SELECT city,state,
CASE 
 WHEN (city IS NULL OR city='') AND (state IS NULL or state='') THEN ''
 ELSE country
END as country_1
 FROM `table`

You can also use IF instead of CASE:
IF ((city IS NULL OR city='') AND (state IS NULL or state=''),'',country) as country_1