INSERT 
INTO DEPARTMENT 
-- 部門コード’A100’のデータをSELECTして各項目にセット
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 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';