GROUP BY在SQL查询语句中的使用

最新推荐文章于 2025-05-17 17:59:53 发布

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最新推荐文章于 2025-05-17 17:59:53 发布

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文章标签： sql user

本文链接：https://blog.youkuaiyun.com/xiaozhao_19/article/details/5417222

本文介绍如何使用SQL查询来统计不同用户的文章数量及点击率，并实现用户排名。包括按类别统计文章数量、总体文章数量统计及用户文章点击率排名。

表content

"ID" "title" "content" "User_ID" "Type_ID" "Hits" "time" "tag"

表type

"ID" "typeName"

表users

"ID" "UserName"

SQL查询语句实现“按某类统计按文章数量给用户排名”

SELECT UserName, aa.ContentCount
FROM [SELECT content.User_ID, Count(content.User_ID) AS ContentCount
FROM content, type
WHERE (((type.ID)=1) AND ((content.Type_ID)=[type].[id]))
GROUP BY content.User_ID
ORDER BY Count(content.User_ID) DESC]. AS aa, Users
WHERE Users.id=aa.User_ID;

SQL查询语句实现“统计按文章数量给用户排名”

SELECT UserName, aa.ContentCount
FROM [SELECT content.User_ID, Count(content.User_ID) AS ContentCount
FROM content, type
WHERE (content.Type_ID)=[type].[id]
GROUP BY content.User_ID
ORDER BY Count(content.User_ID) DESC]. AS aa, Users
WHERE Users.id=aa.User_ID;

SQL查询语句实现“按用户统计文章点击率排名”

SELECT Sum(content.Hits) AS Hits之总计, content.User_ID
FROM content
GROUP BY content.User_ID
ORDER BY Sum(content.Hits) DESC;