Microsoft Access 在表中压缩多行 [英] Microsoft Access condense multiple lines in a table

问题描述

我在 MS Access 2007 中有一个问题，希望有人能解答.我有一个长而简单的表格，其中包含客户姓名和交货日期.我想通过在一个新字段ALLDays"中列出名称和所有天数来总结此表，同时仍保留所有数据.

I have a question in MS Access 2007 and I hope someone has the answer. I have a long but simple table containing customer names and the days of the week that deliveries are made. I would like to summarize this table by listing the name and all the days into one new field "ALLDays" while still preserving all the data.

源表如下所示:

Name         Day  
CustomerA    Monday  
CustomerA    Thursday  
CustomerB    Tuesday  
CustomerB    Friday  
CustomerC    Wednesday  
CustomerC    Saturday  

我想要一个返回如下结果的查询:

I would like to have a query which returns results like this:

Name         ALLDays  
CustomerA    Monday, Thursday  
CustomerB    Tuesday, Friday  
CustomerC    Wednesday, Saturday  

谢谢.

推荐答案

通常，您必须编写一个函数来创建串联列表.这是我用过的:.

Typically you have to write a function that will allow you to create a concatenated list. Here's what I've used:.

Public Function GetList(SQL As String _
                            , Optional ColumnDelimeter As String = ", " _
                            , Optional RowDelimeter As String = vbCrLf) As String
'PURPOSE: to return a combined string from the passed query
'ARGS:
'   1. SQL is a valid Select statement
'   2. ColumnDelimiter is the character(s) that separate each column
'   3. RowDelimiter is the character(s) that separate each row
'RETURN VAL: Concatenated list
'DESIGN NOTES:
'EXAMPLE CALL: =GetList("Select Col1,Col2 From Table1 Where Table1.Key = " & OuterTable.Key)

Const PROCNAME = "GetList"
Const adClipString = 2
Dim oConn As ADODB.Connection
Dim oRS As ADODB.Recordset
Dim sResult As String

On Error GoTo ProcErr

Set oConn = CurrentProject.Connection
Set oRS = oConn.Execute(SQL)

sResult = oRS.GetString(adClipString, -1, ColumnDelimeter, RowDelimeter)

If Right(sResult, Len(RowDelimeter)) = RowDelimeter Then
    sResult = Mid$(sResult, 1, Len(sResult) - Len(RowDelimeter))
End If

GetList = sResult
oRS.Close
oConn.Close

CleanUp:
    Set oRS = Nothing
    Set oConn = Nothing

Exit Function
ProcErr:
    ' insert error handler
    Resume CleanUp

End Function

Remou 的版本具有附加功能，您可以传递值数组而不是 SQL 语句.

Remou's version has the added feature that you can pass an array of values instead of a SQL statement.

示例查询可能如下所示:

Sample query might look like:

SELECT SourceTable.Name
    , GetList("Select Day From SourceTable As T1 Where T1.Name = """ & [SourceTable].[Name] & """","",", ") AS Expr1
FROM SourceTable
GROUP BY SourceTable.Name;

这篇关于Microsoft Access 在表中压缩多行的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！