SELECT AVG(T1.salary) FROM salary AS T1 JOIN team AS T2 ON T1.team_id = T2.team_id_br WHERE T2.name = 'Boston Red Stockings'
Berapa gaji rata -rata para pemain dalam tim bernama 'Boston Red Stockings'?
CREATE TABLE salary (salary INTEGER, team_id VARCHAR); CREATE TABLE team (team_id_br VARCHAR, name VARCHAR)