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
    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' ;