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'
limit 1
;
-------------------------
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'
;