sql时间比较

date类型

select * from t_base_employee t where t.modify_time>to_date(\'2018-06-28 00:00:00\',\'yyyy-mm-dd hh24:mi:ss\') and t.modify_time<to_date(\'2018-06-29 12:00:00\',\'yyyy-mm-dd hh24:mi:ss\');

char类型

select * from Hr_Emp_Org_v t where t.C_OPERATE_TIME>\'2018-06-28 00:00:00\' and t.C_OPERATE_TIME<\'2018-06-29 12:00:00\' and t.C_EMPLOYEE_STATUS=\'在职\'

timestamp类型

select *
  from Tb_Sta_Emp t
 where t.C_OPERATE_TIME >
       to_timestamp(\'2018-06-28 00:00:0.000000000\',
                    
                    \'yyyy-mm-dd hh24:mi:ss.ff9\');