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'
    , LAYER
    , UP_DEPT_CODE
    , '1'
    , UPDATE_USER_NAME
    , '2023-04-01 00:00:00'
from
    DEPARTMENT
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 
    (DEPARTMENT.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 
    (EMP.DEPT_CODE in('A100','A200')) and
    (VALID_FLG = '1')
;