Group By but include “missing” values

Question

Suppose I have the following.

select
  case
    when fcompany = \'Acme\' then \'Red\'
    when fcompany = \'Acme Rockets\' then \'Blue\'
    else \'Green\'
  en         


        

Answer 1

Try this:

SELECT  b.Color, 
                sum(fann_sales) 
 FROM   (
                SELECT  case
                                    when fcompany = 'Acme' then 'Red'
                                    when fcompany = 'Acme Rockets' then 'Blue'
                                    else 'Green'
                                end
                                Color,
                                fann_sales
                    FROM slcdpm
            ) a  RIGHT JOIN 
            (
                SELECT 'Red' AS Color
                UNION ALL
                SELECT 'Blue' AS Color
                UNION ALL
                SELECT 'Green' AS Color
            ) b
        ON a.Color = b.Color            
 GROUP BY  b.Color