Show me the player id with salary 545000?
SELECT distinct T1.player_id FROM salary AS T1 JOIN team AS T2 ON T1.team_id   =   T2.team_id_br WHERE T1.salary  =  545000
player id refers to player_id; salary of 545000 refers to WHERE salary = 545000; distinct is used to return unique player_id values; joining tables salary and team on team_id.