sql - 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存储过程，它将返回一个数字(平均值) - 这是我到目前为止所拥有的......

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.) 评分总计
B.) 评级条目数量

我想从存储过程返回评级总计/评级条目。

谁能帮我解决语法问题吗？

Answer 1

只需使用AVG函数:

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