select to_timestamp(time/1000),time,apname from test_user limit 2;
select to_timestamp(time/1000) from test_user where to_char(to_timestamp(time/1000),'YYYYMMDD')='20110621' limit 5;
select to_timestamp(time/1000) from test_user where to_char(to_timestamp(time/1000),'HH12:MI:SS')='11:28:40' limit 50;