SQL查询帮助，MS SQL服务器2005年（群由和有）

Question

我在ms sql server 2005中编写一个查询，并有一些麻烦让它运行。我需要我的查询包括：

1. 包括从日期范围内的所有文档2009-07-20至2009-08-04
2. 使用“尺寸”领域的总和列
3. 包括记录计数列
4. 集团通过名称

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

Answer 1

既然你在查询不属于聚集（SUM，COUNT，AVG），你可以使用一个普通字段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，如果你想基于限制的东西一个集合，例如

HAVING Count(*) > 5 

马克

PS：如果你想显示的不是字节MB，使用此查询：

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

你应该列添加名称到集团通过列表。

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