计数几个月没有记录

我在数据库中的数据如下：计数几个月没有记录

+---------------------+-------------+ 
|  CloseTime |  Count | 
+---------------------+-------------+ 
|  10.2.2014 13:19 | 1   | 
|  5.12.2014 13:19 | 1   | 
|  4.2.2014 13:19 | 1   | 
|  2.1.2014 13:19 | 1   | 
|  4.12.2014 13:19 | 1   | 
+---------------------+-------------+

现在，我有这样的

SELECT DATENAME(MONTH, CLOSETIME) AS CLOSEMONTH, COUNT(*) as CNT 
FROM TABLE 
WHERE CLOSETIME >= DATEADD(MONTH, DATEDIFF(MONTH, '19000101', GETDATE())-7, '19000101') 
AND CLOSETIME < DATEADD(MONTH, DATEDIFF(MONTH, '19000101', GETDATE()), '19000101') 
GROUP BY DATENAME(MONTH, CLOSETIME);

这导致

+---------------+-------+ 
|  CloseTime | CNT | 
+---------------+-------+ 
|  February | 2  | 
|  January | 1  | 
|  December | 2  | 
+---------------+-------+

的查询查询以最近7个月的数据获取方式工作。我需要的结果是

+---------------+-------+ 
|  CloseTime | Count | 
+---------------+-------+ 
|  February | 2  | 
|  January | 1  | 
|  December | 2  | 
|  November | 0  | 
|  October | 0  | 
|  September | 0  | 
|  August | 0  | 
+---------------+-------+

因此，如果有与后几个月关闭时间没有记录，它应该还是回到了一个月零计数。如何实现这一目标？我更喜欢SQL解决方案，这意味着没有任何过程或脚本。

我试图

SELECT DATENAME(MONTH,DATEADD(MONTH,-1,GETDATE())) as HELP_MONTH 
UNION ALL 
...

，然后加入它，但它并没有成功。

来源

2014-03-04 DNac

相关http://stackoverflow.com/q uestions/7121914/sql-group-and-sum-by-month-default-to-zero？rq = 1 – 2014-03-04 12:34:45

你工作在哪个'DBMS'？ – Hamidreza

SQL Server 2008 R2，忘了提及，感谢您的通知！ – DNac

确定的代码，这个工作对我来说：

WITH HM (HELP_MONTH) AS (
SELECT DATENAME(MONTH,DATEADD(MONTH,-1,GETDATE())) AS HELP_MONTH 
UNION ALL 
SELECT DATENAME(MONTH,DATEADD(MONTH,-2,GETDATE())) AS HELP_MONTH 
UNION ALL 
SELECT DATENAME(MONTH,DATEADD(MONTH,-3,GETDATE())) AS HELP_MONTH 
UNION ALL 
SELECT DATENAME(MONTH,DATEADD(MONTH,-4,GETDATE())) AS HELP_MONTH 
UNION ALL 
SELECT DATENAME(MONTH,DATEADD(MONTH,-5,GETDATE())) AS HELP_MONTH 
UNION ALL 
SELECT DATENAME(MONTH,DATEADD(MONTH,-6,GETDATE())) AS HELP_MONTH 
UNION ALL 
SELECT DATENAME(MONTH,DATEADD(MONTH,-7,GETDATE())) AS HELP_MONTH) 
SELECT HELP_MONTH 
,COUNT(CNT) AS CNT 
FROM HM 
LEFT JOIN YOUR_TABLE ON HM.HELP_MONTH = DATENAME(MONTH, CLOSETIME) 
AND CLOSETIME >= DATEADD(MONTH, DATEDIFF(MONTH, '19000101', GETDATE())-7, '19000101') 
AND CLOSETIME < DATEADD(MONTH, DATEDIFF(MONTH, '19000101', GETDATE()), '19000101') 
GROUP BY DATENAME(MONTH, CLOSETIME), HELP_MONTH

来源

2014-03-05 09:24:17 DNac

使用相同的查询，通过添加HAVING子句将会添加0计数的记录。

SELECT DATENAME(MONTH, CLOSETIME) AS CLOSEMONTH, COUNT(*) as CNT 
FROM TABLE 
WHERE CLOSETIME >= DATEADD(MONTH, DATEDIFF(MONTH, '19000101', GETDATE())-7, '19000101') 
AND CLOSETIME < DATEADD(MONTH, DATEDIFF(MONTH, '19000101', GETDATE()), '19000101') 
GROUP BY DATENAME(MONTH, CLOSETIME) 
HAVING COUNT(*) >= 0

谢谢。

来源

2014-03-04 13:17:14

那没有返回预期的输出。它返回与我的查询相同的结果。 – DNac

下面的查询可以LEFT JOIN版与您的结果集：

SELECT * FROM 
(
    SELECT 'January' AS month_name, 1 AS month_num 
    UNION 
    SELECT 'February',2 
    UNION 
    SELECT 'Mar',3 
    UNION 
    SELECT 'Apr',4 
    UNION 
    SELECT 'May',5 
    UNION 
    SELECT 'June',6 
    UNION 
    SELECT 'July',7 
    UNION 
    SELECT 'August', 8 
    UNION 
    SELECT 'September', 9 
    UNION 
    SELECT 'October', 10 
    UNION 
    SELECT 'November', 11 
    UNION 
    SELECT 'December', 12 
) 
months 
WHERE month_num <= MONTH(GETDATE()) 
OR month_num > (MONTH(GETDATE()) - 7) % 12 + 12

上面的查询提供了近7个月的结果集：

这里是一个SQL Fiddle

来源

2014-03-04 13:31:09

计数几个月没有记录

回答

相关问题