SELECT
    FIRST_LOGIN
    , COUNT(MEMBER_CODE) AS MEMBER_CNT
FROM (
    SELECT
        MEMBER_CODE
        , DATE(MIN(LOGIN_DATETIME)) AS FIRST_LOGIN
    FROM
        ACCESS_LOG
    GROUP BY
        MEMBER_CODE
    HAVING
        FIRST_LOGIN BETWEEN '2023-08-01' AND '2023-08-31'
) sub
GROUP BY
    FIRST_LOGIN
ORDER BY
    FIRST_LOGIN DESC
;