如何计算范围内一列的值。 [英] How to count values from one column within a range.

问题描述

我有一个名为Displacement的表，其中有一个包含置换日期的列。我想要下面提到的列的日期计数。什么应该是这种情况的查询。



2007年之前，2007-2008之间，2008-2009之间，



我尝试了以下查询，但它无效。

I have a table named as Displacement, in which there is a column containg date of displacement. I want the count of dates for the columns mentionted below. What should be the query for such condition.

Before 2007, Between 2007-2008, Between 2008-2009,

I have tried the following query but its not working.

Select
SUM(CASE isnull(Year(IO7_DateOfDisplacement), 0) WHEN (IO7_DateOfDisplacement is < 2007) THEN 1 ELSE 0 END) AS [Before 2007],
SUM(CASE isnull(Year(IO7_DateOfDisplacement), 0) WHEN  (Between 2007 and 2008) THEN 1 ELSE 0 END) AS [Between 2007-2008]

我将感谢您的帮助。

Usama Javed

I shall be thankful for you help.
Usama Javed

推荐答案

select SUM(xyz) from table_name where YEAR(your date field)=//or whatever is your condition

问候......：笑：

Regards..:laugh:

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