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