WITH UNION ALL unable to use ORDER BY

Question

When I am running

SELECT concat(name,\'(\',substring(occupation,1,1),\')\')  
FROM  occupations    
UNION ALL 
SELECT concat(\'There are total \',count(occupati         


        

Answer 1

SELECT concat(name,'(',substring(occupation,1,1),')') as name
FROM  occupations    
UNION ALL 
SELECT concat('There are total ',count(occupation),' ', occupation,'.') as name
FROM occupations GROUP BY occupation 
ORDER BY name

Update: Why this is so:
Because you don't have a common column named, name. When you apply a function to a query, mysql use a combination of that function name and parameters to create a column name for you. Which in reality means query will have a name of concat(name,'(',substring(occupation,1,1),')') (most probably upper cased) while the second will have concat('There are total ',count(occupation),' ', occupation,'.')

It doesn't matter that the names are different as far as Union is concerned because mysql is smart enough to combine them together by their data type. However when you add an order by clause you need a column name that's common to both.