select * from表在哪裏（動態條件）

Question

我的存儲過程中收到 「@CatergoryIDs VARCHAR」

@CatergoryIDs包含分離單個或多個ID 「|」，

我的存儲過程是這樣的：

Select R.ID,,CategoryID, (sum(C.Rating)/Count(R.ID)) as "Rating" 
    from Table1 R 
    left outer join Table2 C 
    ON R.ID = C.ID 
    GROUP BY R.ID 
    having R.CategoryID = @CatergoryID 
    RETURN 

Answer 1

您應該可以使用CHARINDEX。但是，這非常低效，因此將@CategoryID作爲表變量會更好。

SET @CatergoryID = '|'+@CatergoryID+'|'; 
SELECT R.ID, R.CategoryID, (SUM(C.Rating)/COUNT(R.ID)) AS Rating 
    FROM Table1 AS R 
    LEFT OUTER JOIN Table2 AS C 
    ON R.ID = C.ID 
    WHERE CHARINDEX('|'+R.CategoryID+'|', @CatergoryID)>0 
    GROUP BY R.ID, R.CategoryID