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  • sql group by max

    SELECT
        * ,
        REPLACE(TDFG.xdfd,'doc_111','') GB
    FROM
        (
            SELECT
                *
            FROM
                (
                    SELECT
                        *
                    FROM
                        (
                            SELECT
                                *,
                                CASE sender
                                    WHEN 'doc_111'
                                    THEN CONCAT(receiver,sender)
                                    ELSE CONCAT(sender,receiver)
                                END 'xdfd'
                            FROM
                                user_msg )TTTT
                    ORDER BY
                        create_time DESC) t
            GROUP BY
                xdfd ) TDFG
    INNER JOIN
        user_doc SSD
    ON
        SSD.id=REPLACE(TDFG.xdfd,'doc_111','')

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  • 原文地址:https://www.cnblogs.com/rhxuza1993/p/9796539.html
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