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 VALID_FLG = '0' 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';
 
SELECT *
FROM EMP;