How to get Sum from two tables?

Question

i have two tables first one name is \"sales\" and second one name is \"items\" in both tables have same columns \"code\" and \" qtd \"; i want write MYSQL query witch i need sum

Answer 1

Try this:

Select code, sum(qtd) 
from (
select code, qtd from sales
union all
select code, qtd from items) as innerTable
group by code