SQL分组排序去重复的小实例
发布时间:2016-12-29 来源:查字典编辑
摘要:复制代码代码如下:SELECT*FROM(SELECTuserid,classid,remark,ROW_NUMBER()OVER(PART...
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。