-- 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'
           ,'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')
;