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';

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') 
    AND VALID_FLG = '1' 
    AND END_DATE IS NULL;

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';