这是我目前拥有的代码。它计算评论业力中的第一个值与下一个值之间的差异。链接因果相同的事情。我需要计数在显示新作者时重新启动。这是我无法弄清楚的部分。
SELECT [author]
, [Date (Toronto)]
, Subreddit
, Likes
, Moderator
, [User: is_gold]
, [User: link karma]
, [User: comment karma]
, COUNT(type) AS #comment
, coalesce([User: comment karma] - LAG([User: comment karma]) OVER (
ORDER BY author
, [Date (Toronto)]
), 0) AS diff_comment_karma
, coalesce([User: link karma] - LAG([User: link karma]) OVER (
ORDER BY author
, [Date (Toronto)]
), 0) AS diff_link_karma
FROM Comment
GROUP BY Author
, [Date (Toronto)]
, Subreddit
, Likes
, Moderator
, [User: is_gold]
, [User: link karma]
, [User: comment karma]
, Type
ORDER BY Author
, [Date (Toronto)]
这是我目前的结果
author User: comment karma User: link karma diff_comment_karma diff_link_karma
CheezGrater 20665 7840 19394 7530
CheezGrater 20665 7840 0 0
CheeziTater 1 1 -20664 -7839
CheeziTater 1 1 0 0
Cheezsteak7 45 174 44 173
CheezulWeezul 1 1 -44 -173
CheezulWeezul 1 1 0 0
chef_baboon 4266 1643 4265 1642
chef_baboon 4266 1643 0 0
chef_baboon 4266 1643 0 0
这是我想要的结果
author User: comment karma User: link karma diff_comment_karma diff_link_karma
CheezGrater 20665 7840 19394 7530
CheezGrater 20665 7840 0 0
CheeziTater 1 1 **0 0**
CheeziTater 1 1 0 0
Cheezsteak 45 174 **0 0**
CheezulWeezul 1 1 **0 0**
CheezulWeezul 1 1 0 0
chef_baboon 4266 1643 **0 0**
chef_baboon 4266 1643 0 0
chef_baboon 4266 1643 0 0