How to combine two sql queries into one

Question

How can I combine these two SQL statements?

SELECT SUM(hits01 + hits02 + hits03 + hits04 + hits05 + hits06 + hits07 + hits08 + hits09) AS \'AEROwiz\'
FROM tb         


        

Answer 1

SELECT  SUM(hits01 + hits02 + hits03 + hits04 + hits05 + hits06 +  
hits07 + hits08 + hits09) AS 'AEROwiz' 
FROM    tbl_2011 
WHERE   appName='AEROwiz' 

UNION ALL

SELECT  SUM(hits10 + hits11 + hits12) AS 'AEROwiz' 
FROM    tbl_2010 
WHERE   appName='AEROwiz' 

Use UNION ALL as it will allow duplicates, and UNION will not put duplicates in the query result. With the SUM() aggregate, I'm guessing there's a good chance of duplication summations, so I'd go with UNION ALL for this one.