oracle中查询日期记录方法

1.date1 between \'" + dateTimePicker1.Value.ToShortDateString() + " 00:00:00\' and \'" + dateTimePicker2.Value.ToShortDateString() + " 23:59:59\'

2.select * from CFLOW.T_FLOW_ORIGINAL_INFO where last_update_time>= to_date(\'2017-05-16 10:47:15\',\'YYYY-MM-DD HH24:MI:ss\') and last_update_time<=to_date(\'2017-05-16 10:50:17\',\'YYYY-MM-DD HH24:MI:ss\')