mysql 查询数据库中不存在的ID

mysql 查询数据库中不存在的ID

输入一批ID，然后，执行SQL，返回数据库不存在的ID

select id from t_user where id not in (1,2,3,4,5,6);

select id from (select id from t_user where id in (1,2,3,4,5,6)) where id not in (1,2,3,4,5,6)