มีผู้เล่นกี่คนในทีม Boston Red Stockings ในปี 2000?ไม่จำเป็นต้องใช้ตารางทั้งหมด
How many players were in the team Boston Red Stockings in 2000?It is not neccessary to use all the tables.
 salary:  (team_id [ VARCHAR ] year [ VARCHAR) ]
SELECT COUNT(*) FROM salary AS T1 JOIN team AS T2 ON T1.team_id = T2.team_id_br WHERE T2.name = 'Boston Red Stockings' AND T1.year = 2000