如何计算由id命令的所有星星 [英] how to count all stars ordered by id's

问题描述

我有商店的桌子评级：



TableName：房价

i have table for store the rating:

TableName: Rates

ID Rating
1  4
2  5
1  3
2  4
3  4
2  3

我想按ID计算总评分，并使用asp.net-C＃

I want to count the total rating by id and store the another table using asp.net-C#

推荐答案

创建一个新表并从旧表中按ID插入这些值。

create a new table and insert those values from old table Group by ID's

insert into  Ratings1(ID, rating )SELECT ID, SUM(rating) as TotalRating FROM Rates ORDER BY IDSELECT ID, SUM(rating) as TotalRating FROM Rates Group BY ID

学习它。



< a href =http://www.w3schools.com/sql/sql_insert_into_select.asp> http://www.w3schools.com/sql/sql_insert_into_select.asp [ ^ ]





http://www.w3schools.com/sql/sql_groupby.asp [ ^ ]

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