SQL查詢幫助，MS SQL服務器2005年（羣由和有）

Question

我在ms sql server 2005中編寫一個查詢，並有一些麻煩讓它運行。我需要我的查詢包括：

1. 包括從日期範圍內的所有文檔2009-07-20至2009-08-04
2. 使用「尺寸」領域的總和列
3. 包括記錄計數列
4. 集團通過名稱

select Name, count(*) AS FileCount, SUM(Size) 
From alldocs 
Group by DirName 
HAVING TimeCreated >= '2009-07-20' AND 
TimeCreated <= '2009-08-04' 

Answer 1

既然你在查詢不屬於聚集（SUM，COUNT，AVG），你可以使用一個普通字段WHERE：

SELECT 
    DirName, count(*) AS FileCount, SUM(Size) 
FROM 
    alldocs 
WHERE 
    TimeCreated >= '2009-07-20' 
    AND TimeCreated <= '2009-08-04' 
GROUP BY 
    DirName 

你只需要在HAVING，如果你想基於限制的東西一個集合，例如

HAVING Count(*) > 5 

馬克

PS：如果你想顯示的不是字節MB，使用此查詢：

SELECT 
    DirName, count(*) AS FileCount, SUM(Size)/(1024*1024) as 'Size MB' 
FROM 
    alldocs 
WHERE 
    TimeCreated >= '2009-07-20' AND TimeCreated <= '2009-08-04' 
GROUP BY 
    DirName 

Answer 2

WH y不是

select Name, count(*) AS FileCount, SUM(Size) 
From alldocs 
WHERE TimeCreated between '2009-07-20' AND '2009-08-04' 
Group by DirName 

？

Answer 3

你應該列添加名稱到集團通過列表。

SELECT Name, count(*) AS FileCount, SUM(Size) 
FROM alldocs 
WHERE TimeCreated between '2009-07-20' AND '2009-08-04' 
GROUP BY Name