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 as dep

WHERE DEPT_CODE ='A100'
 ;

UPDATE DEPARTMENT as dep 
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'
;

select * from DEPARTMENT ;