对于有重复记录的情况下应用，话不多说，直接上语句：

MERGE INTO t_trace_coin_stat_temp temp
USING (SELECT '13851430000' as send_terminal_id FROM dual) lg
ON (temp.terminal_id = lg.send_terminal_id)
WHEN MATCHED THEN
  UPDATE
     SET temp.cur_mth_send_cnt = temp.cur_mth_send_cnt + 1,
         temp.left_cnt         = temp.left_cnt + 1
WHEN NOT MATCHED THEN
  INSERT
  VALUES
    (lg.send_terminal_id, 1, 0, 1, to_char(SYSDATE, 'yyyymmddhh24miss'));

?