insert into
    DEPARTMENT
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';