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

a1ex07 is right, but you need to fix a few query errors in his SELECT stmt.

first, there is a missing comma after "state" and second, if your table were really called "table" you have to enclose in backticks because it is a reserved MySQL keyword.

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`` 

(exlude second backtick, stackoverflow uses those for syntax highlighting if single.)