insert into DEPARTMENT 
select
    'B300'
    , '2023-04-01'
    , NULL
    , '新設部門'
    , DP1.LAYER
    , DP1.UP_DEPT_CODE
    , '1'
    , DP1.UPDATE_USER_NAME
    , '2023-04-01 00:00:00' 
from
    DEPARTMENT AS DP1 
where
    DP1.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 (DEPT_CODE = 'A100' or DEPT_CODE = 'A200') and VALID_FLG = '1';
    
--select * from DEPARTMENT;