Question

I have two tables.

• First table have columns: price, code_one
• Second table has: code_one, code_two

Both tables could be joined using code_one table.

How to have “Sum of prices grouped by code_two” ?

I tried:

Select sum(price) from table1 Group By (select a.code_two from table2 a, table1 b where a.code_one = b.code_one)

Answer 1

select code_two, SUM(price)
from table1 t1 INNER JOIN table2 t2 ON t1.code_one = t2.code_one
group by code_two