SELECT T2.name ,  count(*) FROM singer_in_concert AS T1 JOIN singer AS T2 ON T1.singer_id  =  T2.singer_id GROUP BY T2.singer_id
List singer names and number of concerts for each singer.
SELECT T2.name , count ( * ) FROM singer_in_concert AS T1 JOIN singer AS T2 ON T1.singer_id = T2.singer_id GROUP BY T2.singer_id
select t2 . name , count ( * ) from singer_in_concert as t1 join singer as t2 on t1 . singer_id = t2 . singer_id group by t2 . singer_id
List singer names and number of concerts for each singer .