Question

我无法获得一个sproc来给我这种类型的输出：

+-----------+------------------+
|   Month   | NoOfModifcations |
+-----------+------------------+
| Jan  2008 |                5 |
| Nov  2008 |                6 |
| Feb  2010 |               20 |
| Jul  2013 |                7 |
+-----------+------------------+

到目前为止，我设法让输出看起来像这样，但我还没有设法让输出按年份排序，然后是月份 - 它按字母顺序排列。这是我到目前为止所拥有的：

SELECT convert(varchar(4), YEAR(LastModifedDate)) + ' ' + convert(varchar(3),datename(month, LastModifedDate)) as Dates,
    count(*) as Number

FROM aims.Modification

WHERE CompanyID = @companyID 
    AND LastModifedDate >= DATEADD(month, @numberOfMonths * -1, GETDATE())

GROUP BY convert(varchar(4), YEAR(LastModifedDate)) + ' ' + convert(varchar(3),datename(month, LastModifedDate))

我确实在日期时间字段上尝试了ORDER BY但得到了：

Column "aims.Modification.LastModifedDate" is invalid in the ORDER BY clause because it is not contained in either an aggregate function or the GROUP BY clause.

将日期时间转换/选择/分组到字符串也非常混乱。那里的任何建议也会非常有帮助！

提前致谢！

Answer 1

这应该做：

SELECT  CONVERT(VARCHAR(4),YEAR(LastModifedDate)) + ' ' + 
        CONVERT(VARCHAR(3),DATENAME(MONTH,LastModifedDate)) AS Dates,
        COUNT(*) as Number
FROM aims.Modification
WHERE CompanyID = @companyID 
    AND LastModifedDate >= DATEADD(MONTH,@numberOfMonths * -1,GETDATE())
GROUP BY CONVERT(VARCHAR(4),YEAR(LastModifedDate)) + ' ' + 
         CONVERT(VARCHAR(3),DATENAME(MONTH,LastModifedDate)),
         CONVERT(VARCHAR(6),LastModifedDate,112)
ORDER BY CONVERT(VARCHAR(6),LastModifedDate,112)

Answer 2

SELECT YEAR(LastModifedDate), MONTH(month) as Dates, count(*) as Number
FROM aims.Modification
WHERE CompanyID = @companyID 
    AND LastModifedDate >= DATEADD(month, @numberOfMonths * -1, GETDATE())
GROUP BY YEAR(LastModifedDate), MONTH(LastModifiedDate)
ORDER BY YEAR(LastModifedDate), MONTH(LastModifiedDate)

保持简单，并在C＃代码或报告中进行连接......

Answer 3

使用此选项将varchar转换为datetime

 SELECT CONVERT(Datetime,'Jan  2008 ')

然后根据日期时间desc对列进行排序。对不起，简短而未完成的答案，希望它有所帮助。

计算日期时间每个月内的行数，按年份分组

3 个答案: