Question

我有一个带有ClientID（PK）的客户端表和带有日期/时间作为数据类型的DOB字段。我需要创建一个查询来训练年龄组，例如：

Age Group  Count

18 – 24      2
25 - 35      1
36 - 45      2
46 - 55      5
56 - 65      0
66+          2
Not stated   5
Total        17

我有以下sql查询：

SELECT DISTINCT Partition(DateDiff("yyyy",[DOB],Date())(DateSerial(Year(Date()),Month([DOB]),Day([DOB]))>Date()),19,66,8) AS Range, 
Count(ClientsDetails.ClientID) AS CountOfAgeGroups
FROM ClientsDetails
GROUP BY Partition(DateDiff("yyyy",[DOB],Date())+(DateSerial(Year(Date()),Month([DOB]),Day([DOB]))>Date()),19,66,8);

它产生以下结果：

Range    CountOfAgeGroup   
:18      1
27:34    4
35:42    1
67:      1

有人可以指导我应该对查询做出哪些更改，或者可能建议最佳解决方案以达到预期效果，因为我对Access不太熟悉。

提前致谢。

这是我查询的第二部分。是否也可以使用参数搜索在两个日期之间找到年龄组。例如，如果我想在01/01/14和17/03/14之间找到年龄组。我使用Gord Thompson发布的解决方案尝试了以下方法，但它丢失了错误的表达式错误：

SELECT [%$##@_Alias].AgeGroup, Count(*) AS CountOfAgeGroup, Support.ClientID
FROM (SELECT Switch([Age] Between 18 And 24, "18-24", [Age] Between 25 And 35, "25-35", [Age] Between 36 And 45, "36-45", [Age] Between 46 And 55, "46-55",[Age] Between 56 And 65,  "56-65",[Age] > 66, "66+") AS AgeGroup FROM (SELECT DateDiff("yyyy",[DOB],Date())-IIf(Format(Date(),"mmdd")<Format([DOB],"mmdd"),1,0) AS Age FROM ClientsDetails)  AS [%$##@_Alias])  AS [%$##@_Alias], Support
GROUP BY [%$##@_Alias].AgeGroup,Support.ClientID
HAVING (((Support.ClientID) Between [Enter Start Date] And [Enter End Date]));

Answer 1

如果我们从一个计算实际年龄的查询开始（基于[Date_of_Birth]字段和Date()函数）

SELECT 
    DateDiff("yyyy",[Date_of_Birth],Date())-IIf(Format(Date(),"mmdd")<Format([Date_of_Birth],"mmdd"),1,0) AS Age
FROM Students

然后我们可以将其用作子查询并应用Switch()函数（ref：here）为每个条目分配[AgeGroup]

SELECT
    Switch([Age] Between 0 And 17, "0-17", [Age] Between 18 And 24, "18-24", [Age] Between 25 And 35, "25-35", [Age] > 35, "Over 35") AS AgeGroup
FROM
    (
        SELECT 
            DateDiff("yyyy",[Date_of_Birth],Date())-IIf(Format(Date(),"mmdd")<Format([Date_of_Birth],"mmdd"),1,0) AS Age
        FROM Students
    )

然后将整个内容包装在聚合查询中

SELECT
    AgeGroup,
    Count(*) AS CountOfAgeGroup
FROM
    (
        SELECT
            Switch([Age] Between 0 And 17, "0-17", [Age] Between 18 And 24, "18-24", [Age] Between 25 And 35, "25-35", [Age] > 35, "Over 35") AS AgeGroup
        FROM
            (
                SELECT 
                    DateDiff("yyyy",[Date_of_Birth],Date())-IIf(Format(Date(),"mmdd")<Format([Date_of_Birth],"mmdd"),1,0) AS Age
                FROM Students
            )
    )
GROUP BY AgeGroup

获得这样的结果

AgeGroup  CountOfAgeGroup
--------  ---------------
0-17                    5
18-24               12897
25-35                3537
Over 35               766

在Access 2010中对年龄范围进行分组

1 个答案: