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

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 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';