从MySQL表中检索和输入所有“类型”,但只检索每个“类型”的最新条目

SELECT  mi.*
FROM    (
        SELECT  DISTINCT type
        FROM    mytable
        ) md
JOIN    mytable mi
ON      mi.id = 
        (
        SELECT  mo.id
        FROM    mytable mo
        WHERE   mo.type = md.type
        ORDER BY
                mo.type DESC, mo.version DESC, mo.id DESC
        LIMIT 1
        )

在上创建索引 (type, version, id)

SELECT
    y.*
    FROM YourTable y
        INNER JOIN (SELECT
                        Type,MAX(Version) AS MaxVersion
                        FROM YourTable
                        GROUP BY Type
                   ) dt ON y.Type=dt.Type AND y.Version=dt.Version