返回所有月份，而不是仅仅4

Question

我从数据库中的一些数据，但其仅4个月了今年。我希望它能够全部返回12个月。使用SQL Server Management Studio 2010中这里Im是SQL代码

SELECT Month = datename(month,dateadd(mm,datediff(mm,0,StartTime),0)), Count (TestName) 
FROM VExecutionGlobalHistory 
Where Tester <> 'dit2988'  
group by 
dateadd(mm,datediff(mm,0,StartTime),0), year(dateadd(mm,datediff(mm,0,StartTime),0)) 
order by 
dateadd(mm,datediff(mm,0,StartTime),0), year(dateadd(mm,datediff(mm,0,StartTime),0)) 

这将返回

|April|92 | 
|May |79 | 
|June |164 | 
|July |162 | 

，我想也有一些硬编码的数据添加到返回，并有七月最新的，所以我会有这样的事情。

|August |number| 
|September|number| 
|October |number| 
|November |number| 
|December |number| 
|January |number| 
|February |number| 
|March |number| 
|April |92 | 
|May  |79 | 
|June  |164 | 
|July  |162 | 

，所有的“数字”是那些从的arent数据库拉，只是我希望把

建议？

Answer 1

只需创建从最初的日期到你想要的最后日期理货，并做了左按月数和年与您的数据连接：

DECLARE @start_date DATETIME, @end_date DATETIME; 

SELECT @start_date = CAST('2010-08-01' AS DATETIME), 
    @end_date = CAST('2011-07-01' AS DATETIME); 

WITH MonthTally(initial_date,month_name, month_number, year_number) AS 
(
    SELECT @start_date initial_date, datename(month,@start_date) month_name, month(@start_date) month_number, year(@start_date) year_number 
    UNION ALL 
    SELECT DATEADD(month,1,initial_date), datename(month, DATEADD(month,1,initial_date)), month(DATEADD(month,1,initial_date)), year(DATEADD(month,1,initial_date)) 
    FROM MonthTally 
    WHERE initial_date < @end_date 
) 
SELECT month_name, Count(TestName) 
FROM MonthTally MT 
    LEFT JOIN VExecutionGlobalHistory V ON MT.year_number=YEAR(V.StartTime) AND MT.month_number=MONTH(V.StartTime) AND Tester <> 'dit2988'  
group by 
    month_name, year_number, month_number 
order by 
    year_number, month_number 

检查功能例如here。因为在`VExecutionGlobalHistory`对于那些月无数据（`仪<>“dit2988'` excpet可能）