-- 処理１
INSERT INTO department
    SELECT 
    'B300'
    , '2023-04-01'
    , NULL
    , '新設部門'
    , DP1.LAYER
    , DP1.UP_DEPT_CODE
    ,'1'
    , DP1.UPDATE_USER_NAME
    , '2023-04-01 00:00:00'
    FROM department AS DP1
    WHERE
     DP1.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 DEPT_CODE IN ('A100', 'A200')
AND VALID_FLG = '1';