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'
;

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');

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'
;