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' LIMIT 1),
    (SELECT DISTINCT UP_DEPT_CODE FROM DEPARTMENT WHERE DEPT_CODE = 'A100' LIMIT 1),
    1,
    (SELECT DISTINCT UPDATE_USER_NAME FROM DEPARTMENT WHERE DEPT_CODE = 'A100' LIMIT 1),
    '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';