INSERT INTO
DEPARTMENT (DEPT_CODE ,START_DATE,END_DATE,DEPT_NAME,VALID_FLG,USER_UPDATE_DATETIME,LAYER,UP_DEPT_CODE,UPDATE_USER_NAME)
VALUES('B300','2023-04-01',NULL,'新設部門','1','2023-04-01 00:00:00',
(SELECT LAYER  FROM 
DEPARTMENT where DEPT_CODE='A100'),

(SELECT UP_DEPT_CODE  FROM 
DEPARTMENT where DEPT_CODE='A100'),
(SELECT UPDATE_USER_NAME  FROM 
DEPARTMENT where DEPT_CODE='A100')
)

;
UPDATE DEPARTMENT SET 
END_DATE = '2023-03-31'
,VALID_FLG='0'
,UPDATE_USER_NAME='ORG_CHG'
,USER_UPDATE_DATETIME = '2023-03-31 23:59:59'
where DEPT_CODE in ('A100','A200');

UPDATE EMP
SET
DEPT_CODE='B300' 
,START_DATE = '2023-04-01',
UPDATE_USER_NAME = 'ORG_CHG',USER_UPDATE_DATETIME = '2023-04-01 00:00:00'
 where DEPT_CODE in ('A100','A200') and VALID_FLG='1';
SELECT * FROM DEPARTMENT;