如何返回 SQL Server 存储过程的计算（聚合）结果

Question

我正在尝试编写一个将返回一个数字（平均值）的存储过程 - 这就是我目前所拥有的......

ALTER PROCEDURE [dbo].[sp_GetAverageRating]
    @RecipeNodeId int 
AS 
    SET NOCOUNT ON;

    (SELECT SUM(Rating) AS RatingTotal
     FROM dbo.RecipeRating
     WHERE RecipeNodeId = @RecipeNodeId)

    (SELECT 
         COUNT(Rating) AS RatingEntries 
     FROM dbo.RecipeRating 
     WHERE RecipeNodeId = @RecipeNodeId)

所以这有效并给了我

A.) 总评分
B.) 评分条目数

我想从存储过程中返回 Rating Total / Rating Entries。

谁能帮我看看语法吗？

Answer 1

只需使用 AVG 功能：

SELECT AVG(Rating) as RatingTotal
FROM dbo.RecipeRating
WHERE RecipeNodeId = @RecipeNodeId