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' as DEPT_CODE
    ,'2023-04-01' as START_DATE
    ,NULL as END_DATE
    ,'新設部門' as DEPT_NAME
    ,LAYER
    ,UP_DEPT_CODE
    ,'1' as VALID_FLG
    ,UPDATE_USER_NAME
    ,'2023-04-01 00:00:00' as USER_UPDATE_DATETIME
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
    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'
    )
;