如何比较两个csv文件，并使用powershell找到区别

问题描述

我有两个csv文件，我想要比较这两个文件，并找到difference.It包含user_id

我试图与compare-object，diff但无法实现。

喜欢

AD_Users.csv

Oracle_Users .csv

都包含用户ID，输出应该像

AD用户不存在于Oracle

Oracle用户在AD中不存在

例如 - K9988484
J8485888

我尝试使用compare-object，diff但是无法实现。

解决方案

看起来像这样：

 ＃的内容ad.csv 
 user_id，field1，field2 
 useronlyad，value1 ，value2 
 userboth，value3，value4 
  

而且：

 ＃content of oracle.csv 
 user_id，field1，field2 
 useronlyoracle，value1，value2 
 userboth，value3，value4 
 

您可以获得不是oracle用户喜欢的广告用户（借用）：

 ＃返回所有不是oracle用户的广告用户
 import-module .\Scripting.psm1 
 $ ad_hashset = new-hashset string 
 $ oracle_hashset = new-hashset string 
 import-csv .\ad.csv | ForEach-Object {$ ad_hashset.add（$ _。user_id）} 
 import-csv .\oracle.csv | ForEach-Object {$ oracle_hashset.add（$ _。user_id）} 
 $ ad_hashset.ExceptWith（$ oracle_hashset）
 $ ad_hashset＃将返回useronlyad 
 类似的，你可以得到不是这样的广告用户的oracle用户
 
 code>＃返回所有不是oracle用户的广告用户
 import-module .\Scripting.psm1 
 $ ad_hashset = new-hashset string 
 $ oracle_hashset = new-hashset string 
 import-csv .\ad.csv | ForEach-Object {$ ad_hashset.add（$ _。user_id）} 
 import-csv .\oracle.csv | ForEach-Object {$ oracle_hashset.add（$ _。user_id）} 
 $ oracle_hashset.ExceptWith（$ ad_hashset）
 $ oracle_hashset＃将返回useronlyoracle 
  pre> 
 
 
 简要说明：
 
 
创建两个集合（散列集）
 
 
使用在其对应的CSV中找到的数据填充散列集
 
 
删除第二个集合中的所有元素第一个收藏
 
 
 
I have two csv files , I want to compare both files and find difference.It contains user_id

I tried with compare-object, diff but could not achieve.

like

AD_Users.csv                

Oracle_Users.csv

both contains user id , output should be like

AD user does not exist in Oracle

Oracle user does not exist in AD

eg -  K9988484
      J8485888

I tried with compare-object, diff but could not achieve.
 解决方案 
Assuming your csv files look like this:
# contents of ad.csv
user_id,field1,field2
useronlyad,value1,value2
userboth,value3,value4
and this:
# contents of oracle.csv
user_id,field1,field2
useronlyoracle,value1,value2
userboth,value3,value4
You could get the ad users that are not oracle users like this (borrowing New-HashSet from Josh Einstein):
# to return all ad users that are not oracle users
import-module .\Scripting.psm1
$ad_hashset = new-hashset string
$oracle_hashset = new-hashset string
import-csv .\ad.csv | ForEach-Object {$ad_hashset.add($_.user_id)}
import-csv .\oracle.csv | ForEach-Object {$oracle_hashset.add($_.user_id)}
$ad_hashset.ExceptWith($oracle_hashset)
$ad_hashset # will return useronlyad
Similarly, you could get the oracle users that are not ad users like this
# to return all ad users that are not oracle users
import-module .\Scripting.psm1
$ad_hashset = new-hashset string
$oracle_hashset = new-hashset string
import-csv .\ad.csv | ForEach-Object {$ad_hashset.add($_.user_id)}
import-csv .\oracle.csv | ForEach-Object {$oracle_hashset.add($_.user_id)}
$oracle_hashset.ExceptWith($ad_hashset)
$oracle_hashset # will return useronlyoracle
Brief explanation of how this works:
Create two collections (hashsets)
Populate the hashsets with the data found in their corresponding CSV
Removes all elements in the second collection from the first collection
                        
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