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
*
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。
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