-- 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)
    VALUES('B300', '2023-04-01', NULL, '新設部門', 2, '1000', '1', 
    'SYSTEM', '2023-04-01 00:00:00');
 
-- 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';
 
 select * from department;
 
--  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';

select * from EMP;