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复制代码 代码如下:
SELECT
*
FROM
(
SELECT
userid,
classid,
remark,
ROW_NUMBER () OVER (
PARTITION BY userid,
classid
ORDER BY
addtime DESC
) AS row_bank
FROM
Eng24VIPCourseIntention
) AS ta
WHERE
row_bank = 1
==========================
PARTITIONBYuserid,classid 这里是按什么分组， 注意一下。
SELECT
*
FROM
(
SELECT
userid,
classid,
remark,
ROW_NUMBER () OVER (
PARTITION BY userid,
classid
ORDER BY
addtime DESC
) AS row_bank
FROM
Eng24VIPCourseIntention
) AS ta
WHERE
row_bank = 1
==========================
PARTITIONBYuserid,classid 这里是按什么分组， 注意一下。
昆仑资源网 Design By www.lawayou.com
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昆仑资源网 Design By www.lawayou.com
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