Вечность

update TBonuses set fcount = fcount + 400 where f_account in (17937, 161596, 42305, 6221); 
update TBonuses set fcount = fcount + 1700 where f_account in (1903, 9704, 4208); 

EvTech

update TBonuses set fcount = fcount + 531 where f_account in (72039);