--処理1
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'
;

--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 in('A100','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 DEPT_CODE in('A100','A200')
;