-- 処理１
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'
;
-- 処理２
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')
;
-- 処理３
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'
;