insert into department
select
    'B300'
    , START_DATE
    , END_DATE
    , DEPT_NAME
    , LAYER
    , UP_DEPT_CODE
    , VALID_FLG
    , UPDATE_USER_NAME
    , USER_UPDATE_DATETIME
from department
where dept_code = 'A100'
;
update department
set START_DATE = '2023-04-01'
    , END_DATE = NULL
    , DEPT_NAME = '新設部門'
    , VALID_FLG = '1'
    , USER_UPDATE_DATETIME = '2023-04-01 00:00:00'
where dept_code = 'B300'
;
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 = 'A100' or dept_code = '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 valid_flg = '1'
    and (dept_code = 'A100' or dept_code = 'A200')
;