在Powershell中使用Group-Object和-GroupBy

使用Group-Object(group)按组统计

PS C:\> Get-Command -Module Microsoft.PowerShell.LocalAccounts | group Noun 2 
Count Name              Group                                                                                                                     
----- ----              -----                                                                                                                     
    3 LocalGroupMember  {Add-LocalGroupMember, Get-LocalGroupMember, Remove-LocalGroupMember}                                                     
    7 LocalUser         {Disable-LocalUser, Enable-LocalUser, Get-LocalUser, New-LocalUser, Remove-LocalUser, Rename-LocalUser, Set-LocalUser}    
    5 LocalGroup        {Get-LocalGroup, New-LocalGroup, Remove-LocalGroup, Rename-LocalGroup, Set-LocalGroup}   

对统计的结果进行排序，注意：以下两个语句是等效的

PS C:\> Get-Command -Module Microsoft.PowerShell.LocalAccounts | sort Noun | group Noun  2 
Count Name              Group                                                                                                                     
----- ----              -----                                                                                                                     
    5 LocalGroup        {Get-LocalGroup, New-LocalGroup, Remove-LocalGroup, Rename-LocalGroup, Set-LocalGroup}                                    
    3 LocalGroupMember  {Add-LocalGroupMember, Get-LocalGroupMember, Remove-LocalGroupMember}                                                     
    7 LocalUser         {Disable-LocalUser, Enable-LocalUser, Get-LocalUser, New-LocalUser, Remove-LocalUser, Rename-LocalUser, Set-LocalUser}    



PS C:\> Get-Command -Module Microsoft.PowerShell.LocalAccounts | group Noun | sort Name 12 
Count Name              Group                                                                                                                     
----- ----              -----                                                                                                                     
    5 LocalGroup        {Get-LocalGroup, New-LocalGroup, Remove-LocalGroup, Rename-LocalGroup, Set-LocalGroup}                                    
    3 LocalGroupMember  {Add-LocalGroupMember, Get-LocalGroupMember, Remove-LocalGroupMember}                                                     
    7 LocalUser         {Disable-LocalUser, Enable-LocalUser, Get-LocalUser, New-LocalUser, Remove-LocalUser, Rename-LocalUser, Set-LocalUser} 

 

在Format-Table里使用-GroupBy按组显示结果，必须先对Groupby的字段进行排序，否则Groupby的字段不会显示在一起

PS C:\> Get-Command -Module Microsoft.PowerShell.LocalAccounts | sort Noun | ft -GroupBy Noun  2 

 Noun: LocalGroup  5 
CommandType Name Version Source  7 -----------     ----                                               -------    ------                                                                      
Cmdlet          Get-LocalGroup                                     1.0.0.0 Microsoft.PowerShell.LocalAccounts  9 Cmdlet          New-LocalGroup                                     1.0.0.0 Microsoft.PowerShell.LocalAccounts 10 Cmdlet          Remove-LocalGroup                                  1.0.0.0 Microsoft.PowerShell.LocalAccounts 11 Cmdlet          Rename-LocalGroup                                  1.0.0.0 Microsoft.PowerShell.LocalAccounts 12 Cmdlet          Set-LocalGroup                                     1.0.0.0 Microsoft.PowerShell.LocalAccounts 13 

 Noun: LocalGroupMember 16 
CommandType Name Version Source 18 -----------     ----                                               -------    ------                                                                      
Cmdlet          Add-LocalGroupMember                               1.0.0.0 Microsoft.PowerShell.LocalAccounts 20 Cmdlet          Get-LocalGroupMember                               1.0.0.0 Microsoft.PowerShell.LocalAccounts 21 Cmdlet          Remove-LocalGroupMember                            1.0.0.0 Microsoft.PowerShell.LocalAccounts 22 

 Noun: LocalUser 25 
CommandType Name Version Source 27 -----------     ----                                               -------    ------                                                                      
Cmdlet          Disable-LocalUser                                  1.0.0.0 Microsoft.PowerShell.LocalAccounts 29 Cmdlet          Enable-LocalUser                                   1.0.0.0 Microsoft.PowerShell.LocalAccounts 30 Cmdlet          Get-LocalUser                                      1.0.0.0 Microsoft.PowerShell.LocalAccounts 31 Cmdlet          New-LocalUser                                      1.0.0.0 Microsoft.PowerShell.LocalAccounts 32 Cmdlet          Remove-LocalUser                                   1.0.0.0 Microsoft.PowerShell.LocalAccounts 33 Cmdlet          Rename-LocalUser                                   1.0.0.0 Microsoft.PowerShell.LocalAccounts 34 Cmdlet          Set-LocalUser                                      1.0.0.0    Microsoft.PowerShell.LocalAccounts   

Format-Table处理以后，一般不能再进行"|"操作，否则会出错

PS C:\> Get-Command -Module Microsoft.PowerShell.LocalAccounts | ft -AutoSize  2 
CommandType Name Version Source  4 ----------- ----                    ------- ------                            
Cmdlet      Add-LocalGroupMember    1.0.0.0 Microsoft.PowerShell.LocalAccounts  6 Cmdlet      Disable-LocalUser       1.0.0.0 Microsoft.PowerShell.LocalAccounts  7 Cmdlet      Enable-LocalUser        1.0.0.0 Microsoft.PowerShell.LocalAccounts  8 Cmdlet      Get-LocalGroup          1.0.0.0 Microsoft.PowerShell.LocalAccounts  9 Cmdlet      Get-LocalGroupMember    1.0.0.0 Microsoft.PowerShell.LocalAccounts 10 Cmdlet      Get-LocalUser           1.0.0.0 Microsoft.PowerShell.LocalAccounts 11 Cmdlet      New-LocalGroup          1.0.0.0 Microsoft.PowerShell.LocalAccounts 12 Cmdlet      New-LocalUser           1.0.0.0 Microsoft.PowerShell.LocalAccounts 13 Cmdlet      Remove-LocalGroup       1.0.0.0 Microsoft.PowerShell.LocalAccounts 14 Cmdlet      Remove-LocalGroupMember 1.0.0.0 Microsoft.PowerShell.LocalAccounts 15 Cmdlet      Remove-LocalUser        1.0.0.0 Microsoft.PowerShell.LocalAccounts 16 Cmdlet      Rename-LocalGroup       1.0.0.0 Microsoft.PowerShell.LocalAccounts 17 Cmdlet      Rename-LocalUser        1.0.0.0 Microsoft.PowerShell.LocalAccounts 18 Cmdlet      Set-LocalGroup          1.0.0.0 Microsoft.PowerShell.LocalAccounts 19 Cmdlet      Set-LocalUser           1.0.0.0 Microsoft.PowerShell.LocalAccounts 20 


PS C:\> Get-Command -Module Microsoft.PowerShell.LocalAccounts | ft -AutoSize | sort Name 24 
out-lineoutput : The object of type "Microsoft.PowerShell.Commands.Internal.Format.FormatEntryData" is not valid or not in the 26 correct sequence. This is likely caused by a user-specified "format-*" command which is conflicting with the default formatting 27 . 28     + CategoryInfo          : InvalidData: (:) [out-lineoutput], InvalidOperationException 29     + FullyQualifiedErrorId : ConsoleLineOutputOutOfSequencePacket,Microsoft.PowerShell.Commands.OutLineOutputCommand

有时候虽然能执行，但结果也和预期不符

PS C:\> Get-Command -Module Microsoft.PowerShell.LocalAccounts | ft -AutoSize | group Noun  2 
Count Name Group  4 ----- ----                      -----                                                                                          
   19 {Microsoft.PowerShell.Commands.Internal.Format.FormatStartData, Microsoft.PowerShell.Command...  6 


PS C:\> $data = Get-Command -Module Microsoft.PowerShell.LocalAccounts | ft -AutoSize | group Noun 10 
PS C:\> $data.Group 12 
CommandType Name Version Source 14 ----------- ----                    ------- ------                            
Cmdlet      Add-LocalGroupMember    1.0.0.0 Microsoft.PowerShell.LocalAccounts 16 Cmdlet      Disable-LocalUser       1.0.0.0 Microsoft.PowerShell.LocalAccounts 17 Cmdlet      Enable-LocalUser        1.0.0.0 Microsoft.PowerShell.LocalAccounts 18 Cmdlet      Get-LocalGroup          1.0.0.0 Microsoft.PowerShell.LocalAccounts 19 Cmdlet      Get-LocalGroupMember    1.0.0.0 Microsoft.PowerShell.LocalAccounts 20 Cmdlet      Get-LocalUser           1.0.0.0 Microsoft.PowerShell.LocalAccounts 21 Cmdlet      New-LocalGroup          1.0.0.0 Microsoft.PowerShell.LocalAccounts 22 Cmdlet      New-LocalUser           1.0.0.0 Microsoft.PowerShell.LocalAccounts 23 Cmdlet      Remove-LocalGroup       1.0.0.0 Microsoft.PowerShell.LocalAccounts 24 Cmdlet      Remove-LocalGroupMember 1.0.0.0 Microsoft.PowerShell.LocalAccounts 25 Cmdlet      Remove-LocalUser        1.0.0.0 Microsoft.PowerShell.LocalAccounts 26 Cmdlet      Rename-LocalGroup       1.0.0.0 Microsoft.PowerShell.LocalAccounts 27 Cmdlet      Rename-LocalUser        1.0.0.0 Microsoft.PowerShell.LocalAccounts 28 Cmdlet      Set-LocalGroup          1.0.0.0 Microsoft.PowerShell.LocalAccounts 29 Cmdlet      Set-LocalUser           1.0.0.0 Microsoft.PowerShell.LocalAccounts

最后，Group-Object(group)这个cmdlet在Microsoft.PowerShell.Utility这个Module里，不在Microsoft.PowerShell.Core里

PS C:\> Get-Command *-Object* | sort Source | ft -AutoSize  2 
CommandType Name Version Source  4 ----------- ----                 ------- ------                      
Cmdlet      ForEach-Object       3.0.0.0 Microsoft.PowerShell.Core  6 Cmdlet      Where-Object         3.0.0.0 Microsoft.PowerShell.Core  7 Cmdlet      Compare-Object       3.1.0.0 Microsoft.PowerShell.Utility  8 Cmdlet      Group-Object         3.1.0.0 Microsoft.PowerShell.Utility  9 Cmdlet      Measure-Object       3.1.0.0 Microsoft.PowerShell.Utility 10 Cmdlet      New-Object           3.1.0.0 Microsoft.PowerShell.Utility 11 Cmdlet      Register-ObjectEvent 3.1.0.0 Microsoft.PowerShell.Utility 12 Cmdlet      Select-Object        3.1.0.0 Microsoft.PowerShell.Utility 13 Cmdlet      Sort-Object          3.1.0.0 Microsoft.PowerShell.Utility 14 Cmdlet      Tee-Object           3.1.0.0 Microsoft.PowerShell.Utility 15 


PS C:\> Alias | where DisplayName -like "*Object*" | select Definition, Name | sort Definition 19 
Definition Name 21 ----------       ----   
Compare-Object compare 23 Compare-Object diff 24 ForEach-Object %      
ForEach-Object foreach
Get-WmiObject gwmi 27 Group-Object group 28 Measure-Object measure 29 Remove-WMIObject rwmi 30 Select-Object select 31 Sort-Object sort 32 Tee-Object tee 33 Where-Object     ?      
Where-Object     where