WITH A100 AS(
    SELECT *
    FROM DEPARTMENT
    WHERE DEPT_CODE = 'A100'
)

INSERT INTO DEPARTMENT
VALUES(
    'B300',
    '2023-04-01',  
    NULL,
    '新設部門',
    (SELECT LAYER FROM A100),
    (SELECT UP_DEPT_CODE FROM A100),
    '1',
    (SELECT UPDATE_USER_NAME FROM A100),
    '2023-04-01 00:00:00'
);

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';