SELECT TO_CHAR(t^tҏW,'YYYYMMDD HHMISS') FROM SAM_TEST;

SELECT TO_CHAR(t^NҏW,'YYYYMMDD HHMISS') FROM SAM_TEST;

UPDATE SAM_TEST SET t^tҏW=TO_DATE(200501101100,'yyyymmddhhmi');

UPDATE SAM_TEST SET t^NҏW=TO_DATE(200501011215,'yyyymmddhhmi');

(