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' AS DEPT_CODE,
    '2023-04-01' AS START_DATE,
    NULL AS END_DATE,
    '新設部門' AS DEPT_NAME,
    LAYER,
    '1' AS VALID_FLG,
    UP_DEPT_CODE,
    UPDATE_USER_NAME,
    '2023-04-01 00:00:00' AS USER_UPDATE_DATETIME
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' OR 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
    VALID_FLG = 1
    AND (DEPT_CODE = 'A100' OR DEPT_CODE = 'A200');