INSERT INTO DEPARTMENT
(DEPT_CODE
,START_DATE
,END_DATE
,DEPT_NAME
,LAYER 
,UP_DEPT_CODE 
,VALID_FLG 
,UPDATE_USER_NAME 
,USER_UPDATE_DATETIME 
)
SELECT 
    'B300',
    '2023-04-01',
    NULL,
    '新設部門',
    DM.LAYER,
    DM.UP_DEPT_CODE,
    '1',
    DM.UPDATE_USER_NAME,
    '2023-04-01 00:00:00'
FROM DEPARTMENT AS DM
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';