SQL MAX日期在哪裏條款

Question

我需要在我的where子句中使用MAX函數，因爲如果我不這樣做，它會給我錯誤的數據。這裏是我的代碼：

(SELECT 
Index, 
Company, 
FormType, 
MAX(DocumentDate) AS DocumentDate 
FROM dbo.FormInstance AS F 
WHERE f.company = 1234 
AND (
    CAST(FLOOR(CAST([DocumentDate] AS FLOAT))AS DATETIME) 
    BETWEEN CAST(FLOOR(CAST(@StartDate AS FLOAT))AS DATETIME) 
     AND CAST(FLOOR(CAST(@EndDate AS FLOAT))AS DATETIME) 
    ) 
GROUP BY 
Company, 
Index, 
FormType); 

我該怎麼做是說和MAX（DocumentDate）是BETWEEN @Start和@End嗎？

感謝

Answer 1

您GROUP BY語句後添加HAVING MAX(DocumentDate) BETWEEN @Start AND @End。 HAVING實質上是聚合的WHERE子句。