将 CSV 文件中的列分组并连接另一列的值，然后导出回 CSV

Question

这是对此的跟进：

它与这个问题有关：

这个问题：
https://superuser.com/questions/453041/grouping-labels-and-concatenating-their-text-values-like-a-pivot-table

我的目的是获取我的 csv 文件并按“公司”名称分组，但我不知道从哪里开始，我知道 PS 有一个“Group-Object”CmdLet，但它returns我是一个不知道怎么处理的对象

因此，使用我之前的示例列，来自 Spectre 的 Harvey 将从：

PName	Company	ORDERDATE	STREET1	City	ProjectName	Name	Color	OtherData
Charles	Contoso	2022-01-25	FakeStreet 123	San Francisco	Sacramento Expansion	ProductA	Lemon	OtherData
Harvey	Specter	2022-01-25	NotAFake 123	San Diego	North Dakota Expansion	ProductA	Red	OtherData
Harvey	Specter	2022-01-25	NotAFake 123	San Diego	North Dakota Expansion	ProductB	Blue	OtherData

收件人：

PName	Company	ORDERDATE	STREET1	City	ProjectName	Name	Color	OtherData
Charles	Contoso	2022-01-25	FakeStreet 123	San Francisco	Sacramento Expansion	ProductA	Lemon	OtherData
Harvey	Specter	2022-01-25	NotAFake 123	San Diego	North Dakota Expansion	ProductA, ProductB	Red, Blue	OtherData

感谢并一如既往地感谢

Answer 1

根据你的最后一个问题，假设你已经存储了 $result，这就是你如何在 [=13= 的帮助下更新你已经拥有的对象]:

$result | Group-Object Company | ForEach-Object {
    # If the group is 1 object return it and skip next logic
    if($_.Count -eq 1) { return $_.Group }
    # Capture all objects of this group
    $thisGroup = $_.Group
    
    # We know if we are here that `$thisGroup` is an object[],
    # there is at least more than 1 object.
    # `$thisObject[0]` is the object we want to update, so,
    # `$thisObject[0].PropertyName` will enumerate ALL Values
    # of "PropertyName" and we can join them with `-join` and assign
    # the result to the 1st Object
    $thisGroup[0].Name  = $thisGroup.Name -join ', ' # Join these elements
    $thisGroup[0].Color = $thisGroup.Color -join ', '
    # Return ONLY the first object of this object[], this is the
    # object that was updated.
    $thisGroup[0]
} | Format-Table -AutoSize

使用相同的 XML 和我之前的答案来构造 $result，上面代码的输出将是：

PName   Company ORDERDATE  STREET1        City          ProjectName            Name               Color     OtherData
-----   ------- ---------  -------        ----          -----------            ----               -----     ---------
Charles Contoso 2022-01-25 FakeStreet 123 San Francisco Sacramento Expansion   ProductA           Lemon     OtherData
Harvey  Specter 2022-01-25 NotAFake 123   San Diego     North Dakota Expansion ProductA, ProductB Red, Blue OtherData

将 CSV 文件中的列分组并连接另一列的值，然后导出回 CSV

Group column from CSV file and concatenate values of another column, and export back to CSV

csv

powershell

group-by

list