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'
        , 2
        , '1000'
        , '1'
        , 'SYSTEM'
        , '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 = 'A100'
    AND DEPT_CODE = '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 = 'A100' 
    AND DEPT_CODE = 'A200'
    AND VALID_FLG = '1'
;