-- 1. DEPARTMENT に レコード追加
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'
);

-- 2. DEPARTMENT を UPDATE
-- SELECT * FROM DEPARTMENT;
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')
;
-- SELECT * FROM DEPARTMENT;

-- 3. EMP の DEPT_CODE を UPDATE
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;