Case statement will not display a varchar

Question

I need to pass a varchar through a case statement in SQL. The Current data is an integer but I would like to display text.

CASE b.religious_belief
WHEN 01 THEN 'none'     
WHEN 05 THEN 'roman catholic'    
 ELSE 0 
END

I keep getting the error

Conversion failed when converting the varchar value 'none' to data type int.

Answer 1

All returned values from the CASE clauses should be strings (varchar)

CASE b.religious_belief
    WHEN 01 THEN 'none'     
    WHEN 05 THEN 'roman catholic'    
    ELSE 'Jedi' 
END as MyColumnName

Answer 2

CASE b.religious_belief
    WHEN 01 THEN 'none'     
    WHEN 05 THEN 'roman catholic'    
    ELSE '' 
END

The return for the else also needs to be a varchar, so if you're after a "zero" value, then either '' or null would be best.