-- 処理1
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' as DEPT_CODE
 ,'2023-04-01' as START_DATE
 ,null as END_DATE
 ,'新設部門' as DEPT_NAME
 ,LAYER
 ,UP_DEPT_CODE
 ,'1' as VALID_FLG
 ,UPDATE_USER_NAME
 ,'2023-04-01 00:00:00' as USER_UPDATE_DATETIME
from
 DEPARTMENT
where
 DEPT_CODE = 'A100';

-- 処理2
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 = 'A100' or DEPT_CODE = 'A200';

-- 処理3
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 
 VALID_FLG = '1'
 and
  (DEPT_CODE = 'A100' or DEPT_CODE = 'A200');