CSV 中的 Powershell 组对象并将其导出

Question

#foo.csv
No, Fruit, Quality, Units, Location
1, Orange, New, 10, Village
2, Orange, Fresh, 20, City
3, Apple, New, 15, Village
4, Grapes, Fresh, 25, City
5, Apple, Fresh, 30, City
6, Apple, Fresh, 35, City

有了这些数据，我想以下列方式输出：
水果 | 位置 | 质量 | 单位

我无法进一步分组（子组？）数据，我带来的内容如下，但这不是我需要的：

Import-Csv "E:\foo.csv"  | 
Group-Object { $_.Fruit } | 
Select-Object -Property Count, 
    @{ Name = 'Fruits'; Expression = { $_.Name } }, 
    @{ Name = 'Location'; Expression = { ($_.Group | Measure-Object -Property Units -Sum).Sum } } | 
Export-Csv new.csv  -NoTypeInformation

我进一步尝试：

Import-Csv "E:\foo.csv"  | 
Group-Object { $_.Fruit } | 
Select-Object -Property Count, 
    @{ Name = 'Fruits'; Expression = { $_.Name } }, 
    @{ Name = 'Location'; Expression = { $_.Location } },
    @{ Name = 'Quality'; Expression = { $_.Quality } },
    @{ Name = 'Units'; Expression = { ($_.Group | Measure-Object -Property Units -Sum).Sum } } | Sort-Object -Property Count | Format-Table -Auto

但是数据是空白的。

Answer 1

您可以同时按多个属性分组：

Import-Csv "E:\foo.csv"|
Group-Object Fruit,Location,Quality|
Select-Object @{Name='Fruit'   ;Expression={$_.Values[0]}},
              @{Name='Location';Expression={$_.Values[1]}},
              @{Name='Quality' ;Expression={$_.Values[2]}},
              @{Name='Units'   ;Expression={
                  ($_.Group|Measure-Object Units -Sum).Sum
              }}