How To retrieve the records of the custom/standard object of the current user?

Solution:

Id aid = Userinfo.getUserId();

account ac = [Select Id, Name from Account Where CreatedById = : aid limit 1];

System.debug(' ---- ' + ac );

or

Id aid = Userinfo.getUserId();

List<Account> ac = [Select Id, Name From Account Where CreatedById = : aid Limit 10000];