INSERT INTO
    DEPARTMENT
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'
;