SELECT T1.Name ,  sum(T2.Sales) FROM singer AS T1 JOIN song AS T2 ON T1.Singer_ID  =  T2.Singer_ID GROUP BY T1.Name
Show the names of singers and the total sales of their songs.
SELECT T1.Name , sum ( T2.Sales ) FROM singer AS T1 JOIN song AS T2 ON T1.Singer_ID = T2.Singer_ID GROUP BY T1.Name
select t1 . name , sum ( t2 . sales ) from singer as t1 join song as t2 on t1 . singer_id = t2 . singer_id group by t1 . name
Show the names of singers and the total sales of their songs .