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',
  DEPARTMENT_A100.LAYER,
  DEPARTMENT_A100.UP_DEPT_CODE,
  '1',
  DEPARTMENT_A100.UPDATE_USER_NAME,
  '2023-04-01 00:00:00'
from DEPARTMENT as DEPARTMENT_A100 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'